diff --git a/Examples/UIExplorer/AppStateExample.js b/Examples/UIExplorer/AppStateExample.js
deleted file mode 100644
index 04a58c5e80cfb4..00000000000000
--- a/Examples/UIExplorer/AppStateExample.js
+++ /dev/null
@@ -1,67 +0,0 @@
-/**
- * Copyright (c) 2015-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- *
- * @flow
- */
-'use strict';
-
-var React = require('react-native');
-var {
-  AppState,
-  StyleSheet,
-  Text,
-  TouchableHighlight,
-  View,
-} = React;
-
-var Button = React.createClass({
-  render: function() {
-    return (
-      <TouchableHighlight
-        underlayColor={'white'}
-        style={styles.button}
-        onPress={this.props.onPress}>
-        <Text style={styles.buttonLabel}>
-          {this.props.label}
-        </Text>
-      </TouchableHighlight>
-    );
-  }
-});
-
-var styles = StyleSheet.create({
-  button: {
-    padding: 10,
-    alignItems: 'center',
-    justifyContent: 'center',
-  },
-  buttonLabel: {
-    color: 'blue',
-  },
-});
-
-exports.title = 'AppState';
-exports.description = 'App background status and badge value';
-exports.examples = [
-{
-  title: 'Set Badge Number',
-  render: function() {
-    return (
-      <View>
-        <Button
-          onPress={() => AppState.setApplicationIconBadgeNumber(42)}
-          label="Set app's icon badge to 42"
-        />
-        <Button
-          onPress={() => AppState.setApplicationIconBadgeNumber(0)}
-          label="Clear app's icon badge"
-        />
-      </View>
-    );
-  },
-}];
diff --git a/Examples/UIExplorer/PushNotificationIOSExample.js b/Examples/UIExplorer/PushNotificationIOSExample.js
new file mode 100644
index 00000000000000..8201a9662f22c8
--- /dev/null
+++ b/Examples/UIExplorer/PushNotificationIOSExample.js
@@ -0,0 +1,152 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @flow
+ */
+'use strict';
+
+var React = require('react-native');
+var {
+  AlertIOS,
+  PushNotificationIOS,
+  StyleSheet,
+  Text,
+  TouchableHighlight,
+  View,
+} = React;
+
+var Button = React.createClass({
+  render: function() {
+    return (
+      <TouchableHighlight
+        underlayColor={'white'}
+        style={styles.button}
+        onPress={this.props.onPress}>
+        <Text style={styles.buttonLabel}>
+          {this.props.label}
+        </Text>
+      </TouchableHighlight>
+    );
+  }
+});
+
+class NotificationExample extends React.Component {
+  componentWillMount() {
+    PushNotificationIOS.addEventListener('notification', this._onNotification);
+  }
+
+  componentWillUnmount() {
+    PushNotificationIOS.removeEventListener('notification', this._onNotification);
+  }
+
+  render() {
+    return (
+      <View>
+        <Button
+          onPress={this._sendNotification}
+          label="Send fake notification"
+        />
+      </View>
+    );
+  }
+
+  _sendNotification() {
+    require('RCTDeviceEventEmitter').emit('remoteNotificationReceived', {
+      aps: {
+        alert: 'Sample notification',
+        badge: '+1',
+        sound: 'default',
+        category: 'REACT_NATIVE'
+      },
+    });
+  }
+
+  _onNotification(notification) {
+    AlertIOS.alert(
+      'Notification Received',
+      `Alert message: ${notification.getMessage()}`,
+      [{
+        text: 'Dismiss',
+        onPress: null,
+      }]
+    );
+  }
+}
+
+class NotificationPermissionExample extends React.Component {
+  constructor(props) {
+    super(props);
+    this.state = {permissions: null};
+  }
+
+  render() {
+    return (
+      <View>
+        <Button
+          onPress={this._showPermissions.bind(this)}
+          label="Show enabled permissions"
+        />
+        <Text>
+          {JSON.stringify(this.state.permissions)}
+        </Text>
+      </View>
+    );
+  }
+
+  _showPermissions() {
+    PushNotificationIOS.checkPermissions((permissions) => {
+      this.setState({permissions});
+    });
+  }
+}
+
+var styles = StyleSheet.create({
+  button: {
+    padding: 10,
+    alignItems: 'center',
+    justifyContent: 'center',
+  },
+  buttonLabel: {
+    color: 'blue',
+  },
+});
+
+exports.title = 'PushNotificationIOS';
+exports.description = 'Apple PushNotification and badge value';
+exports.examples = [
+{
+  title: 'Badge Number',
+  render(): React.Component {
+    PushNotificationIOS.requestPermissions();
+
+    return (
+      <View>
+        <Button
+          onPress={() => PushNotificationIOS.setApplicationIconBadgeNumber(42)}
+          label="Set app's icon badge to 42"
+        />
+        <Button
+          onPress={() => PushNotificationIOS.setApplicationIconBadgeNumber(0)}
+          label="Clear app's icon badge"
+        />
+      </View>
+    );
+  },
+},
+{
+  title: 'Push Notifications',
+  render(): React.Component {
+    return <NotificationExample />;
+  }
+},
+{
+  title: 'Notifications Permissions',
+  render(): React.Component {
+    return <NotificationPermissionExample />;
+  }
+}];
diff --git a/Examples/UIExplorer/UIExplorer.xcodeproj/project.pbxproj b/Examples/UIExplorer/UIExplorer.xcodeproj/project.pbxproj
index 59adccff32d6ed..ff024216a51050 100644
--- a/Examples/UIExplorer/UIExplorer.xcodeproj/project.pbxproj
+++ b/Examples/UIExplorer/UIExplorer.xcodeproj/project.pbxproj
@@ -21,6 +21,7 @@
 		13B07FBF1A68108700A75B9A /* Images.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 13B07FB51A68108700A75B9A /* Images.xcassets */; };
 		13B07FC11A68108700A75B9A /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = 13B07FB71A68108700A75B9A /* main.m */; };
 		147CED4C1AB3532B00DA3E4C /* libRCTActionSheet.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 147CED4B1AB34F8C00DA3E4C /* libRCTActionSheet.a */; };
+		14DC67F41AB71881001358AB /* libRCTPushNotification.a in Frameworks */ = {isa = PBXBuildFile; fileRef = 14DC67F11AB71876001358AB /* libRCTPushNotification.a */; };
 		D85B829E1AB6D5D7003F4FE2 /* libRCTVibration.a in Frameworks */ = {isa = PBXBuildFile; fileRef = D85B829C1AB6D5CE003F4FE2 /* libRCTVibration.a */; };
 /* End PBXBuildFile section */
 
@@ -88,6 +89,13 @@
 			remoteGlobalIDString = 134814201AA4EA6300B7C361;
 			remoteInfo = RCTActionSheet;
 		};
+		14DC67F01AB71876001358AB /* PBXContainerItemProxy */ = {
+			isa = PBXContainerItemProxy;
+			containerPortal = 14DC67E71AB71876001358AB /* RCTPushNotification.xcodeproj */;
+			proxyType = 2;
+			remoteGlobalIDString = 134814201AA4EA6300B7C361;
+			remoteInfo = RCTPushNotification;
+		};
 		D85B829B1AB6D5CE003F4FE2 /* PBXContainerItemProxy */ = {
 			isa = PBXContainerItemProxy;
 			containerPortal = D85B82911AB6D5CE003F4FE2 /* RCTVibration.xcodeproj */;
@@ -116,6 +124,7 @@
 		13B07FB51A68108700A75B9A /* Images.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; name = Images.xcassets; path = UIExplorer/Images.xcassets; sourceTree = "<group>"; };
 		13B07FB61A68108700A75B9A /* Info.plist */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.xml; name = Info.plist; path = UIExplorer/Info.plist; sourceTree = "<group>"; };
 		13B07FB71A68108700A75B9A /* main.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; name = main.m; path = UIExplorer/main.m; sourceTree = "<group>"; };
+		14DC67E71AB71876001358AB /* RCTPushNotification.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = RCTPushNotification.xcodeproj; path = ../../Libraries/PushNotificationIOS/RCTPushNotification.xcodeproj; sourceTree = "<group>"; };
 		14E0EEC81AB118F7000DECC3 /* RCTActionSheet.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = RCTActionSheet.xcodeproj; path = ../../Libraries/ActionSheetIOS/RCTActionSheet.xcodeproj; sourceTree = "<group>"; };
 		D85B82911AB6D5CE003F4FE2 /* RCTVibration.xcodeproj */ = {isa = PBXFileReference; lastKnownFileType = "wrapper.pb-project"; name = RCTVibration.xcodeproj; path = ../../Libraries/Vibration/RCTVibration.xcodeproj; sourceTree = "<group>"; };
 /* End PBXFileReference section */
@@ -135,6 +144,7 @@
 				00D2771C1AB8C55500DC1E48 /* libicucore.dylib in Frameworks */,
 				00D2771A1AB8C3E100DC1E48 /* libRCTWebSocketDebugger.a in Frameworks */,
 				D85B829E1AB6D5D7003F4FE2 /* libRCTVibration.a in Frameworks */,
+				14DC67F41AB71881001358AB /* libRCTPushNotification.a in Frameworks */,
 				147CED4C1AB3532B00DA3E4C /* libRCTActionSheet.a in Frameworks */,
 				134454601AAFCABD003F0779 /* libRCTAdSupport.a in Frameworks */,
 				134A8A2A1AACED7A00945AAE /* libRCTGeolocation.a in Frameworks */,
@@ -177,6 +187,7 @@
 			isa = PBXGroup;
 			children = (
 				D85B82911AB6D5CE003F4FE2 /* RCTVibration.xcodeproj */,
+				14DC67E71AB71876001358AB /* RCTPushNotification.xcodeproj */,
 				14E0EEC81AB118F7000DECC3 /* RCTActionSheet.xcodeproj */,
 				13417FFA1AA91531003F314A /* ReactKit.xcodeproj */,
 				134454551AAFCAAE003F0779 /* RCTAdSupport.xcodeproj */,
@@ -259,6 +270,14 @@
 			name = Products;
 			sourceTree = "<group>";
 		};
+		14DC67E81AB71876001358AB /* Products */ = {
+			isa = PBXGroup;
+			children = (
+				14DC67F11AB71876001358AB /* libRCTPushNotification.a */,
+			);
+			name = Products;
+			sourceTree = "<group>";
+		};
 		83CBB9F61A601CBA00E9B192 = {
 			isa = PBXGroup;
 			children = (
@@ -371,6 +390,10 @@
 					ProductGroup = 134180271AA91779003F314A /* Products */;
 					ProjectRef = 134180261AA91779003F314A /* RCTNetwork.xcodeproj */;
 				},
+				{
+					ProductGroup = 14DC67E81AB71876001358AB /* Products */;
+					ProjectRef = 14DC67E71AB71876001358AB /* RCTPushNotification.xcodeproj */;
+				},
 				{
 					ProductGroup = 13417FEB1AA914B8003F314A /* Products */;
 					ProjectRef = 13417FEA1AA914B8003F314A /* RCTText.xcodeproj */;
@@ -453,6 +476,13 @@
 			remoteRef = 147CED4A1AB34F8C00DA3E4C /* PBXContainerItemProxy */;
 			sourceTree = BUILT_PRODUCTS_DIR;
 		};
+		14DC67F11AB71876001358AB /* libRCTPushNotification.a */ = {
+			isa = PBXReferenceProxy;
+			fileType = archive.ar;
+			path = libRCTPushNotification.a;
+			remoteRef = 14DC67F01AB71876001358AB /* PBXContainerItemProxy */;
+			sourceTree = BUILT_PRODUCTS_DIR;
+		};
 		D85B829C1AB6D5CE003F4FE2 /* libRCTVibration.a */ = {
 			isa = PBXReferenceProxy;
 			fileType = archive.ar;
diff --git a/Examples/UIExplorer/UIExplorerList.js b/Examples/UIExplorer/UIExplorerList.js
index d0996fcbbbc283..14de683873144f 100644
--- a/Examples/UIExplorer/UIExplorerList.js
+++ b/Examples/UIExplorer/UIExplorerList.js
@@ -48,7 +48,6 @@ var APIS = [
   require('./ActionSheetIOSExample'),
   require('./AdSupportIOSExample'),
   require('./AlertIOSExample'),
-  require('./AppStateExample'),
   require('./AppStateIOSExample'),
   require('./AsyncStorageExample'),
   require('./CameraRollExample.ios'),
@@ -56,6 +55,7 @@ var APIS = [
   require('./LayoutExample'),
   require('./NetInfoExample'),
   require('./PointerEventsExample'),
+  require('./PushNotificationIOSExample'),
   require('./StatusBarIOSExample'),
   require('./TimerExample'),
   require('./VibrationIOSExample'),
diff --git a/Libraries/AppState/AppState.js b/Libraries/AppState/AppState.js
deleted file mode 100644
index f1ef2505db321c..00000000000000
--- a/Libraries/AppState/AppState.js
+++ /dev/null
@@ -1,28 +0,0 @@
-/**
- * Copyright (c) 2015-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- *
- * @providesModule AppState
- */
-'use strict';
-
-var NativeModules = require('NativeModules');
-var RCTAppState = NativeModules.AppState;
-
-var AppState = {
-
-  setApplicationIconBadgeNumber: function(number) {
-    RCTAppState.setApplicationIconBadgeNumber(number);
-  },
-
-  getApplicationIconBadgeNumber: function(callback) {
-    RCTAppState.getApplicationIconBadgeNumber(callback);
-  },
-
-};
-
-module.exports = AppState;
diff --git a/Libraries/Utilities/PushNotificationIOS.js b/Libraries/PushNotificationIOS/PushNotificationIOS.js
similarity index 66%
rename from Libraries/Utilities/PushNotificationIOS.js
rename to Libraries/PushNotificationIOS/PushNotificationIOS.js
index fe77c69b3e914d..733ab24926c3b8 100644
--- a/Libraries/Utilities/PushNotificationIOS.js
+++ b/Libraries/PushNotificationIOS/PushNotificationIOS.js
@@ -7,22 +7,34 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule PushNotificationIOS
+ * @flow
  */
 'use strict';
 
 var NativeModules = require('NativeModules');
 var RCTDeviceEventEmitter = require('RCTDeviceEventEmitter');
-
-var RCTPushNotificationManager = NativeModules.PushNotificationManager;
-if (RCTPushNotificationManager) {
-  var _initialNotification = RCTPushNotificationManager.initialNotification;
-}
+var RCTPushNotificationManager = require('NativeModules').PushNotificationManager;
+var invariant = require('invariant');
 
 var _notifHandlers = {};
+var _initialNotification = RCTPushNotificationManager &&
+  RCTPushNotificationManager.initialNotification;
 
 var DEVICE_NOTIF_EVENT = 'remoteNotificationReceived';
 
 class PushNotificationIOS {
+  _data: Object;
+  _alert: string | Object;
+  _sound: string;
+  _badgeCount: number;
+
+  static setApplicationIconBadgeNumber(number) {
+    RCTPushNotificationManager.setApplicationIconBadgeNumber(number);
+  }
+
+  static getApplicationIconBadgeNumber(callback) {
+    RCTPushNotificationManager.getApplicationIconBadgeNumber(callback);
+  }
 
   static addEventListener(type, handler) {
     _notifHandlers[handler] = RCTDeviceEventEmitter.addListener(
@@ -33,6 +45,18 @@ class PushNotificationIOS {
     );
   }
 
+  static requestPermissions() {
+    RCTPushNotificationManager.requestPermissions();
+  }
+
+  static checkPermissions(callback) {
+    invariant(
+      typeof callback === 'function',
+      'Must provide a valid callback'
+    );
+    RCTPushNotificationManager.checkPermissions(callback);
+  }
+
   static removeEventListener(type, handler) {
     if (!_notifHandlers[handler]) {
       return;
@@ -68,24 +92,24 @@ class PushNotificationIOS {
     });
   }
 
-  getMessage() {
+  getMessage(): ?string | ?Object {
     // alias because "alert" is an ambiguous name
     return this._alert;
   }
 
-  getSound() {
+  getSound(): ?string {
     return this._sound;
   }
 
-  getAlert() {
+  getAlert(): ?string | ?Object {
     return this._alert;
   }
 
-  getBadgeCount() {
+  getBadgeCount(): ?number {
     return this._badgeCount;
   }
 
-  getData() {
+  getData(): ?Object {
     return this._data;
   }
 }
diff --git a/Libraries/PushNotificationIOS/RCTPushNotification.xcodeproj/project.pbxproj b/Libraries/PushNotificationIOS/RCTPushNotification.xcodeproj/project.pbxproj
new file mode 100644
index 00000000000000..507f47aa0b84ef
--- /dev/null
+++ b/Libraries/PushNotificationIOS/RCTPushNotification.xcodeproj/project.pbxproj
@@ -0,0 +1,256 @@
+// !$*UTF8*$!
+{
+	archiveVersion = 1;
+	classes = {
+	};
+	objectVersion = 46;
+	objects = {
+
+/* Begin PBXBuildFile section */
+		148699CF1ABD045300480536 /* RCTPushNotificationManager.m in Sources */ = {isa = PBXBuildFile; fileRef = 148699CE1ABD045300480536 /* RCTPushNotificationManager.m */; };
+/* End PBXBuildFile section */
+
+/* Begin PBXCopyFilesBuildPhase section */
+		58B511D91A9E6C8500147676 /* CopyFiles */ = {
+			isa = PBXCopyFilesBuildPhase;
+			buildActionMask = 2147483647;
+			dstPath = "include/$(PRODUCT_NAME)";
+			dstSubfolderSpec = 16;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXCopyFilesBuildPhase section */
+
+/* Begin PBXFileReference section */
+		134814201AA4EA6300B7C361 /* libRCTPushNotification.a */ = {isa = PBXFileReference; explicitFileType = archive.ar; includeInIndex = 0; path = libRCTPushNotification.a; sourceTree = BUILT_PRODUCTS_DIR; };
+		148699CD1ABD045300480536 /* RCTPushNotificationManager.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = RCTPushNotificationManager.h; sourceTree = "<group>"; };
+		148699CE1ABD045300480536 /* RCTPushNotificationManager.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = RCTPushNotificationManager.m; sourceTree = "<group>"; };
+/* End PBXFileReference section */
+
+/* Begin PBXFrameworksBuildPhase section */
+		58B511D81A9E6C8500147676 /* Frameworks */ = {
+			isa = PBXFrameworksBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXFrameworksBuildPhase section */
+
+/* Begin PBXGroup section */
+		134814211AA4EA7D00B7C361 /* Products */ = {
+			isa = PBXGroup;
+			children = (
+				134814201AA4EA6300B7C361 /* libRCTPushNotification.a */,
+			);
+			name = Products;
+			sourceTree = "<group>";
+		};
+		58B511D21A9E6C8500147676 = {
+			isa = PBXGroup;
+			children = (
+				148699CD1ABD045300480536 /* RCTPushNotificationManager.h */,
+				148699CE1ABD045300480536 /* RCTPushNotificationManager.m */,
+				134814211AA4EA7D00B7C361 /* Products */,
+			);
+			sourceTree = "<group>";
+		};
+/* End PBXGroup section */
+
+/* Begin PBXNativeTarget section */
+		58B511DA1A9E6C8500147676 /* RCTPushNotification */ = {
+			isa = PBXNativeTarget;
+			buildConfigurationList = 58B511EF1A9E6C8500147676 /* Build configuration list for PBXNativeTarget "RCTPushNotification" */;
+			buildPhases = (
+				58B511D71A9E6C8500147676 /* Sources */,
+				58B511D81A9E6C8500147676 /* Frameworks */,
+				58B511D91A9E6C8500147676 /* CopyFiles */,
+			);
+			buildRules = (
+			);
+			dependencies = (
+			);
+			name = RCTPushNotification;
+			productName = RCTDataManager;
+			productReference = 134814201AA4EA6300B7C361 /* libRCTPushNotification.a */;
+			productType = "com.apple.product-type.library.static";
+		};
+/* End PBXNativeTarget section */
+
+/* Begin PBXProject section */
+		58B511D31A9E6C8500147676 /* Project object */ = {
+			isa = PBXProject;
+			attributes = {
+				LastUpgradeCheck = 0610;
+				ORGANIZATIONNAME = Facebook;
+				TargetAttributes = {
+					58B511DA1A9E6C8500147676 = {
+						CreatedOnToolsVersion = 6.1.1;
+					};
+				};
+			};
+			buildConfigurationList = 58B511D61A9E6C8500147676 /* Build configuration list for PBXProject "RCTPushNotification" */;
+			compatibilityVersion = "Xcode 3.2";
+			developmentRegion = English;
+			hasScannedForEncodings = 0;
+			knownRegions = (
+				en,
+			);
+			mainGroup = 58B511D21A9E6C8500147676;
+			productRefGroup = 58B511D21A9E6C8500147676;
+			projectDirPath = "";
+			projectRoot = "";
+			targets = (
+				58B511DA1A9E6C8500147676 /* RCTPushNotification */,
+			);
+		};
+/* End PBXProject section */
+
+/* Begin PBXSourcesBuildPhase section */
+		58B511D71A9E6C8500147676 /* Sources */ = {
+			isa = PBXSourcesBuildPhase;
+			buildActionMask = 2147483647;
+			files = (
+				148699CF1ABD045300480536 /* RCTPushNotificationManager.m in Sources */,
+			);
+			runOnlyForDeploymentPostprocessing = 0;
+		};
+/* End PBXSourcesBuildPhase section */
+
+/* Begin XCBuildConfiguration section */
+		58B511ED1A9E6C8500147676 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				COPY_PHASE_STRIP = NO;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu99;
+				GCC_DYNAMIC_NO_PIC = NO;
+				GCC_OPTIMIZATION_LEVEL = 0;
+				GCC_PREPROCESSOR_DEFINITIONS = (
+					"DEBUG=1",
+					"$(inherited)",
+				);
+				GCC_SYMBOLS_PRIVATE_EXTERN = NO;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 8.1;
+				MTL_ENABLE_DEBUG_INFO = YES;
+				ONLY_ACTIVE_ARCH = YES;
+				SDKROOT = iphoneos;
+			};
+			name = Debug;
+		};
+		58B511EE1A9E6C8500147676 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				ALWAYS_SEARCH_USER_PATHS = NO;
+				CLANG_CXX_LANGUAGE_STANDARD = "gnu++0x";
+				CLANG_CXX_LIBRARY = "libc++";
+				CLANG_ENABLE_MODULES = YES;
+				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_BOOL_CONVERSION = YES;
+				CLANG_WARN_CONSTANT_CONVERSION = YES;
+				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
+				CLANG_WARN_EMPTY_BODY = YES;
+				CLANG_WARN_ENUM_CONVERSION = YES;
+				CLANG_WARN_INT_CONVERSION = YES;
+				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
+				CLANG_WARN_UNREACHABLE_CODE = YES;
+				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
+				COPY_PHASE_STRIP = YES;
+				ENABLE_NS_ASSERTIONS = NO;
+				ENABLE_STRICT_OBJC_MSGSEND = YES;
+				GCC_C_LANGUAGE_STANDARD = gnu99;
+				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
+				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
+				GCC_WARN_UNDECLARED_SELECTOR = YES;
+				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
+				GCC_WARN_UNUSED_FUNCTION = YES;
+				GCC_WARN_UNUSED_VARIABLE = YES;
+				IPHONEOS_DEPLOYMENT_TARGET = 8.1;
+				MTL_ENABLE_DEBUG_INFO = NO;
+				SDKROOT = iphoneos;
+				VALIDATE_PRODUCT = YES;
+			};
+			name = Release;
+		};
+		58B511F01A9E6C8500147676 /* Debug */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				HEADER_SEARCH_PATHS = (
+					"$(inherited)",
+					/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include,
+					"$(SRCROOT)/../../ReactKit/**",
+				);
+				LIBRARY_SEARCH_PATHS = (
+					"$(inherited)",
+					"/Users/nicklockwood/fbobjc-hg/Libraries/FBReactKit/js/react-native-github/ReactKit/build/Debug-iphoneos",
+				);
+				OTHER_LDFLAGS = "-ObjC";
+				PRODUCT_NAME = RCTPushNotification;
+				SKIP_INSTALL = YES;
+			};
+			name = Debug;
+		};
+		58B511F11A9E6C8500147676 /* Release */ = {
+			isa = XCBuildConfiguration;
+			buildSettings = {
+				HEADER_SEARCH_PATHS = (
+					"$(inherited)",
+					/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include,
+					"$(SRCROOT)/../../ReactKit/**",
+				);
+				LIBRARY_SEARCH_PATHS = (
+					"$(inherited)",
+					"/Users/nicklockwood/fbobjc-hg/Libraries/FBReactKit/js/react-native-github/ReactKit/build/Debug-iphoneos",
+				);
+				OTHER_LDFLAGS = "-ObjC";
+				PRODUCT_NAME = RCTPushNotification;
+				SKIP_INSTALL = YES;
+			};
+			name = Release;
+		};
+/* End XCBuildConfiguration section */
+
+/* Begin XCConfigurationList section */
+		58B511D61A9E6C8500147676 /* Build configuration list for PBXProject "RCTPushNotification" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				58B511ED1A9E6C8500147676 /* Debug */,
+				58B511EE1A9E6C8500147676 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+		58B511EF1A9E6C8500147676 /* Build configuration list for PBXNativeTarget "RCTPushNotification" */ = {
+			isa = XCConfigurationList;
+			buildConfigurations = (
+				58B511F01A9E6C8500147676 /* Debug */,
+				58B511F11A9E6C8500147676 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = 58B511D31A9E6C8500147676 /* Project object */;
+}
diff --git a/ReactKit/Modules/RCTPushNotificationManager.h b/Libraries/PushNotificationIOS/RCTPushNotificationManager.h
similarity index 52%
rename from ReactKit/Modules/RCTPushNotificationManager.h
rename to Libraries/PushNotificationIOS/RCTPushNotificationManager.h
index 69773c736c3a2d..b8ddd19d937e11 100644
--- a/ReactKit/Modules/RCTPushNotificationManager.h
+++ b/Libraries/PushNotificationIOS/RCTPushNotificationManager.h
@@ -7,13 +7,16 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-#import <FBReactKit/RCTBridgeModule.h>
+#import <UIKit/UIKit.h>
 
-extern NSString *const RKRemoteNotificationReceived;
-extern NSString *const RKOpenURLNotification;
+#import "RCTBridgeModule.h"
 
 @interface RCTPushNotificationManager : NSObject <RCTBridgeModule>
 
 - (instancetype)initWithInitialNotification:(NSDictionary *)initialNotification NS_DESIGNATED_INITIALIZER;
 
++ (void)application:(UIApplication *)application didRegisterUserNotificationSettings:(UIUserNotificationSettings *)notificationSettings;
++ (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)notification;
++ (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation;
+
 @end
diff --git a/Libraries/PushNotificationIOS/RCTPushNotificationManager.m b/Libraries/PushNotificationIOS/RCTPushNotificationManager.m
new file mode 100644
index 00000000000000..19a0f90ee97ad9
--- /dev/null
+++ b/Libraries/PushNotificationIOS/RCTPushNotificationManager.m
@@ -0,0 +1,156 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#import "RCTPushNotificationManager.h"
+
+#import "RCTBridge.h"
+#import "RCTEventDispatcher.h"
+
+NSString *const RCTRemoteNotificationReceived = @"RemoteNotificationReceived";
+NSString *const RCTOpenURLNotification = @"RCTOpenURLNotification";
+
+@implementation RCTPushNotificationManager
+{
+  NSDictionary *_initialNotification;
+}
+
+@synthesize bridge = _bridge;
+
+- (instancetype)init
+{
+  return [self initWithInitialNotification:nil];
+}
+
+- (instancetype)initWithInitialNotification:(NSDictionary *)initialNotification
+{
+  if ((self = [super init])) {
+    _initialNotification = [initialNotification copy];
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(handleRemoteNotificationReceived:)
+                                                 name:RCTRemoteNotificationReceived
+                                               object:nil];
+    [[NSNotificationCenter defaultCenter] addObserver:self
+                                             selector:@selector(handleOpenURLNotification:)
+                                                 name:RCTOpenURLNotification
+                                               object:nil];
+  }
+  return self;
+}
+
+- (void)dealloc
+{
+  [[NSNotificationCenter defaultCenter] removeObserver:self];
+}
+
++ (void)application:(UIApplication *)application didRegisterUserNotificationSettings:(UIUserNotificationSettings *)notificationSettings
+{
+#ifdef __IPHONE_8_0
+  [application registerForRemoteNotifications];
+#endif
+}
+
++ (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)notification
+{
+  [[NSNotificationCenter defaultCenter] postNotificationName:RCTRemoteNotificationReceived
+                                                      object:self
+                                                    userInfo:notification];
+}
+
++ (BOOL)application:(UIApplication *)application
+            openURL:(NSURL *)url
+  sourceApplication:(NSString *)sourceApplication
+         annotation:(id)annotation
+{
+  NSDictionary *payload = @{@"url": [url absoluteString]};
+  [[NSNotificationCenter defaultCenter] postNotificationName:RCTOpenURLNotification
+                                                      object:self
+                                                    userInfo:payload];
+  return YES;
+}
+
+- (void)handleRemoteNotificationReceived:(NSNotification *)notification
+{
+  [_bridge.eventDispatcher sendDeviceEventWithName:@"remoteNotificationReceived"
+                                              body:[notification userInfo]];
+}
+
+- (void)handleOpenURLNotification:(NSNotification *)notification
+{
+  [_bridge.eventDispatcher sendDeviceEventWithName:@"openURL"
+                                              body:[notification userInfo]];
+}
+
+/**
+ * Update the application icon badge number on the home screen
+ */
++ (void)setApplicationIconBadgeNumber:(NSInteger)number
+{
+  RCT_EXPORT();
+
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^{
+    [self requestPermissions];
+  });
+
+  [UIApplication sharedApplication].applicationIconBadgeNumber = number;
+}
+
+/**
+ * Get the current application icon badge number on the home screen
+ */
++ (void)getApplicationIconBadgeNumber:(RCTResponseSenderBlock)callback
+{
+  RCT_EXPORT();
+
+  callback(@[
+    @([UIApplication sharedApplication].applicationIconBadgeNumber)
+  ]);
+}
+
++ (void)requestPermissions
+{
+  RCT_EXPORT();
+
+#ifdef __IPHONE_8_0
+    UIUserNotificationType types = UIUserNotificationTypeSound | UIUserNotificationTypeBadge | UIUserNotificationTypeAlert;
+    UIUserNotificationSettings *notificationSettings = [UIUserNotificationSettings settingsForTypes:types categories:nil];
+    [[UIApplication sharedApplication] registerUserNotificationSettings:notificationSettings];
+#else
+    [[UIApplication sharedApplication] registerForRemoteNotificationTypes:(UIRemoteNotificationTypeBadge | UIRemoteNotificationTypeSound | UIRemoteNotificationTypeAlert)];
+#endif
+}
+
++ (void)checkPermissions:(RCTResponseSenderBlock)callback
+{
+  RCT_EXPORT();
+
+  NSMutableDictionary *permissions = [[NSMutableDictionary alloc] init];
+#ifdef __IPHONE_8_0
+  UIUserNotificationType types = [[[UIApplication sharedApplication] currentUserNotificationSettings] types];
+  permissions[@"alert"] = @((BOOL)(types & UIUserNotificationTypeAlert));
+  permissions[@"badge"] = @((BOOL)(types & UIUserNotificationTypeBadge));
+  permissions[@"sound"] = @((BOOL)(types & UIUserNotificationTypeSound));
+#else
+  UIRemoteNotificationType types = [[UIApplication sharedApplication] enabledRemoteNotificationTypes];
+  permissions[@"alert"] = @((BOOL)(types & UIRemoteNotificationTypeAlert));
+  permissions[@"badge"] = @((BOOL)(types & UIRemoteNotificationTypeBadge));
+  permissions[@"sound"] = @((BOOL)(types & UIRemoteNotificationTypeSound));
+#endif
+
+  callback(@[permissions]);
+}
+
+- (NSDictionary *)constantsToExport
+{
+  return @{
+    @"initialNotification": _initialNotification ?: [NSNull null]
+  };
+}
+
+@end
diff --git a/Libraries/Text/TextStylePropTypes.js b/Libraries/Text/TextStylePropTypes.js
index 8e28b131817fd4..8ed2c0f10c11b9 100644
--- a/Libraries/Text/TextStylePropTypes.js
+++ b/Libraries/Text/TextStylePropTypes.js
@@ -7,14 +7,15 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule TextStylePropTypes
+ * @flow
  */
 'use strict';
 
 var ReactPropTypes = require('ReactPropTypes');
 var ViewStylePropTypes = require('ViewStylePropTypes');
 
-var TextStylePropTypes = {
-  ...ViewStylePropTypes,
+// TODO: use spread instead of Object.assign/create after #6560135 is fixed
+var TextStylePropTypes = Object.assign(Object.create(ViewStylePropTypes), {
   fontFamily: ReactPropTypes.string,
   fontSize: ReactPropTypes.number,
   fontWeight: ReactPropTypes.oneOf(['normal' /*default*/, 'bold']),
@@ -28,7 +29,7 @@ var TextStylePropTypes = {
   writingDirection: ReactPropTypes.oneOf(
     ['auto' /*default*/, 'ltr', 'rtl']
   ),
-};
+});
 
 // Text doesn't support padding correctly (#4841912)
 var unsupportedProps = Object.keys({
@@ -41,8 +42,8 @@ var unsupportedProps = Object.keys({
   paddingHorizontal: null,
 });
 
-for (var key in unsupportedProps) {
-  delete TextStylePropTypes[key];
+for (var ii = 0; ii < unsupportedProps.length; ii++) {
+  delete TextStylePropTypes[unsupportedProps[ii]];
 }
 
 module.exports = TextStylePropTypes;
diff --git a/Libraries/Utilities/Dimensions.js b/Libraries/Utilities/Dimensions.js
index 3bfaf9c52f323f..80d564a2b5899f 100644
--- a/Libraries/Utilities/Dimensions.js
+++ b/Libraries/Utilities/Dimensions.js
@@ -7,6 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule Dimensions
+ * @flow
  */
 'use strict';
 
@@ -22,7 +23,7 @@ class Dimensions {
    *
    * @param {object} dims Simple string-keyed object of dimensions to set
    */
-  static set(dims) {
+  static set(dims: {[key:string]: any}): bool {
     Object.assign(dimensions, dims);
     return true;
   }
@@ -40,7 +41,7 @@ class Dimensions {
    * @param {string} dim Name of dimension as defined when calling `set`.
    * @returns {Object?} Value for the dimension.
    */
-  static get(dim) {
+  static get(dim: string): Object {
     invariant(dimensions[dim], 'No dimension set for key ' + dim);
     return dimensions[dim];
   }
diff --git a/Libraries/Utilities/MessageQueue.js b/Libraries/Utilities/MessageQueue.js
index 81091a54f81fd1..9d6eb867e471c2 100644
--- a/Libraries/Utilities/MessageQueue.js
+++ b/Libraries/Utilities/MessageQueue.js
@@ -7,6 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule MessageQueue
+ * @flow
  */
 'use strict';
 var ErrorUtils = require('ErrorUtils');
@@ -18,6 +19,18 @@ var JSTimersExecution = require('JSTimersExecution');
 
 var INTERNAL_ERROR = 'Error in MessageQueue implementation';
 
+type ModulesConfig = {
+  [key:string]: {
+    moduleID: number;
+    methods: {[key:string]: {
+      methodID: number;
+    }};
+  }
+}
+
+type NameToID = {[key:string]: number}
+type IDToName = {[key:number]: string}
+
 /**
  * So as not to confuse static build system.
  */
@@ -45,7 +58,11 @@ var jsCall = function(module, methodName, params) {
  * efficient numeric IDs.
  * @class MessageQueue
  */
-var MessageQueue = function(remoteModulesConfig, localModulesConfig, customRequire) {
+var MessageQueue = function(
+  remoteModulesConfig: ModulesConfig,
+  localModulesConfig: ModulesConfig,
+  customRequire: (id: string) => any
+) {
   this._requireFunc = customRequire || requireFunc;
   this._initBookeeping();
   this._initNamingMap(remoteModulesConfig, localModulesConfig);
@@ -128,7 +145,10 @@ var MessageQueueMixin = {
    * @param {object} remoteModulesConfig Configuration of modules and their
    * methods.
    */
-  _initNamingMap: function(remoteModulesConfig, localModulesConfig) {
+  _initNamingMap: function(
+    remoteModulesConfig: ModulesConfig,
+    localModulesConfig: ModulesConfig
+  ) {
     this._remoteModuleNameToModuleID = {};
     this._remoteModuleIDToModuleName = {};         // Reverse
 
@@ -142,11 +162,11 @@ var MessageQueueMixin = {
     this._localModuleNameToMethodIDToName = {};   // Reverse
 
     function fillMappings(
-      modulesConfig,
-      moduleNameToModuleID,
-      moduleIDToModuleName,
-      moduleNameToMethodNameToID,
-      moduleNameToMethodIDToName
+      modulesConfig: ModulesConfig,
+      moduleNameToModuleID: NameToID,
+      moduleIDToModuleName: IDToName,
+      moduleNameToMethodNameToID: {[key:string]: NameToID},
+      moduleNameToMethodIDToName: {[key:string]: IDToName}
     ) {
       for (var moduleName in modulesConfig) {
         var moduleConfig = modulesConfig[moduleName];
diff --git a/Libraries/Utilities/PixelRatio.js b/Libraries/Utilities/PixelRatio.js
index 4770937b1fed2f..f8e23398a9c802 100644
--- a/Libraries/Utilities/PixelRatio.js
+++ b/Libraries/Utilities/PixelRatio.js
@@ -7,6 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule PixelRatio
+ * @flow
  */
 'use strict';
 
@@ -52,7 +53,7 @@ class PixelRatio {
    *   - PixelRatio.get() === 3
    *     - iPhone 6 plus
    */
-  static get() {
+  static get(): number {
     return Dimensions.get('window').scale;
   }
 }
diff --git a/Libraries/Utilities/Platform.ios.js b/Libraries/Utilities/Platform.ios.js
index 515e7d288168ef..d02e6fde2a66f3 100644
--- a/Libraries/Utilities/Platform.ios.js
+++ b/Libraries/Utilities/Platform.ios.js
@@ -7,6 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule Platform
+ * @flow
  */
 
 'use strict';
diff --git a/Libraries/Utilities/RCTLog.js b/Libraries/Utilities/RCTLog.js
index 8955382e0dfb64..e5a8db49c4bd5f 100644
--- a/Libraries/Utilities/RCTLog.js
+++ b/Libraries/Utilities/RCTLog.js
@@ -7,6 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule RCTLog
+ * @flow
  */
  /* globals nativeLoggingHook */
 'use strict';
@@ -31,7 +32,7 @@ class RCTLog {
       logFn,
       'Level "' + level + '" not one of ' + Object.keys(levelsMap)
     );
-    if (typeof nativeLoggingHook === 'undefined') {
+    if (typeof global.nativeLoggingHook === 'undefined') {
       // We already printed in xcode, so only log here if using a js debugger
       console[logFn].apply(console, args);
     }
diff --git a/Libraries/Utilities/RCTRenderingPerf.js b/Libraries/Utilities/RCTRenderingPerf.js
index 5662902f01b47c..c6466aa641afc3 100644
--- a/Libraries/Utilities/RCTRenderingPerf.js
+++ b/Libraries/Utilities/RCTRenderingPerf.js
@@ -7,6 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule RCTRenderingPerf
+ * @flow
  */
 'use strict';
 
@@ -15,6 +16,11 @@ var ReactPerf = require('ReactPerf');
 
 var invariant = require('invariant');
 
+type perfModule = {
+  start: () => void;
+  stop: () => void;
+}
+
 var perfModules = [];
 var enabled = false;
 
@@ -58,7 +64,7 @@ var RCTRenderingPerf = {
     perfModules.forEach((module) => module.stop());
   },
 
-  register: function(module) {
+  register: function(module: perfModule) {
     invariant(
       typeof module.start === 'function',
       'Perf module should have start() function'
diff --git a/Libraries/Utilities/TimerMixin.js b/Libraries/Utilities/TimerMixin.js
index 2c570660a4f8aa..0fc68457d67dac 100644
--- a/Libraries/Utilities/TimerMixin.js
+++ b/Libraries/Utilities/TimerMixin.js
@@ -7,9 +7,13 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule TimerMixin
+ * @flow
  */
 'use strict';
 
+var setImmediate = require('setImmediate');
+var clearImmediate = require('clearImmediate');
+
 /**
  * Using bare setTimeout, setInterval, setImmediate and
  * requestAnimationFrame calls is very dangerous because if you forget to cancel
@@ -35,7 +39,10 @@
  */
 
  var setter = function(setter, clearer, array) {
-   return function(callback, delta) {
+   return function(
+     callback: () => void,
+     delta: number
+   ): number {
      var id = setter(() => {
        clearer.call(this, id);
        callback.apply(this, arguments);
@@ -51,7 +58,7 @@
  };
 
  var clearer = function(clearer, array) {
-   return function(id) {
+   return function(id: number) {
      if (this[array]) {
        var index = this[array].indexOf(id);
        if (index !== -1) {
@@ -75,8 +82,8 @@
  var _setImmediate = setter(setImmediate, _clearImmediate, _immediates);
 
  var _rafs = 'TimerMixin_rafs';
- var _cancelAnimationFrame = clearer(cancelAnimationFrame, _rafs);
- var _requestAnimationFrame = setter(requestAnimationFrame, _cancelAnimationFrame, _rafs);
+ var _cancelAnimationFrame = clearer(window.cancelAnimationFrame, _rafs);
+ var _requestAnimationFrame = setter(window.requestAnimationFrame, _cancelAnimationFrame, _rafs);
 
 var TimerMixin = {
   componentWillUnmount: function() {
diff --git a/Libraries/Utilities/createStrictShapeTypeChecker.js b/Libraries/Utilities/createStrictShapeTypeChecker.js
index 0812aa6f49a7a0..cd0d5757a96dcf 100644
--- a/Libraries/Utilities/createStrictShapeTypeChecker.js
+++ b/Libraries/Utilities/createStrictShapeTypeChecker.js
@@ -7,6 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule createStrictShapeTypeChecker
+ * @flow
  */
 'use strict';
 
@@ -15,8 +16,10 @@ var ReactPropTypeLocationNames = require('ReactPropTypeLocationNames');
 var invariant = require('invariant');
 var merge = require('merge');
 
-function createStrictShapeTypeChecker(shapeTypes) {
-  function checkType(isRequired, props, propName, componentName, location) {
+function createStrictShapeTypeChecker(
+  shapeTypes: {[key: string]: ReactPropsCheckType}
+): ReactPropsChainableTypeChecker {
+  function checkType(isRequired, props, propName, componentName, location?) {
     if (!props[propName]) {
       if (isRequired) {
         invariant(
@@ -29,7 +32,8 @@ function createStrictShapeTypeChecker(shapeTypes) {
     }
     var propValue = props[propName];
     var propType = typeof propValue;
-    var locationName = ReactPropTypeLocationNames[location];
+    var locationName =
+      location && ReactPropTypeLocationNames[location] || '(unknown)';
     if (propType !== 'object') {
       invariant(
         false,
@@ -57,11 +61,17 @@ function createStrictShapeTypeChecker(shapeTypes) {
           error.message +
             `\nBad object: ` + JSON.stringify(props[propName], null, '  ')
         );
-        return error;
       }
     }
   }
-  var chainedCheckType = checkType.bind(null, false);
+  function chainedCheckType(
+    props: {[key: string]: any},
+    propName: string,
+    componentName: string,
+    location?: string
+  ): ?Error {
+    return checkType(false, props, propName, componentName, location);
+  }
   chainedCheckType.isRequired = checkType.bind(null, true);
   return chainedCheckType;
 }
diff --git a/Libraries/Utilities/deepFreezeAndThrowOnMutationInDev.js b/Libraries/Utilities/deepFreezeAndThrowOnMutationInDev.js
index e5530204e3f773..9263116ed7075f 100644
--- a/Libraries/Utilities/deepFreezeAndThrowOnMutationInDev.js
+++ b/Libraries/Utilities/deepFreezeAndThrowOnMutationInDev.js
@@ -7,8 +7,11 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule deepFreezeAndThrowOnMutationInDev
+ * @flow
  */
 
+'use strict';
+
 /**
  * If your application is accepting different values for the same field over
  * time and is doing a diff on them, you can either (1) create a copy or
@@ -26,7 +29,7 @@
  * Freezing the object and adding the throw mechanism is expensive and will
  * only be used in DEV.
  */
-function deepFreezeAndThrowOnMutationInDev(object) {
+function deepFreezeAndThrowOnMutationInDev(object: Object) {
   if (__DEV__) {
     if (typeof object !== 'object' ||
         object === null ||
diff --git a/Libraries/Utilities/differ/insetsDiffer.js b/Libraries/Utilities/differ/insetsDiffer.js
index 887a482a1078dc..b0a40947037937 100644
--- a/Libraries/Utilities/differ/insetsDiffer.js
+++ b/Libraries/Utilities/differ/insetsDiffer.js
@@ -7,9 +7,17 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule insetsDiffer
+ * @flow
  */
 'use strict';
 
+type Inset = {
+  top: ?number;
+  left: ?number;
+  right: ?number;
+  bottom: ?number;
+}
+
 var dummyInsets = {
 	top: undefined,
 	left: undefined,
@@ -17,7 +25,10 @@ var dummyInsets = {
 	bottom: undefined,
 };
 
-var insetsDiffer = function(one, two) {
+var insetsDiffer = function(
+  one: ?Inset,
+  two: ?Inset
+): bool {
   one = one || dummyInsets;
   two = two || dummyInsets;
   return one !== two && (
diff --git a/Libraries/Utilities/differ/pointsDiffer.js b/Libraries/Utilities/differ/pointsDiffer.js
index cd2c558d293589..c4939199f06eb7 100644
--- a/Libraries/Utilities/differ/pointsDiffer.js
+++ b/Libraries/Utilities/differ/pointsDiffer.js
@@ -7,12 +7,18 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule pointsDiffer
+ * @flow
  */
 'use strict';
 
+type Point = {
+  x: ?number;
+  y: ?number;
+}
+
 var dummyPoint = {x: undefined, y: undefined};
 
-var pointsDiffer = function(one, two) {
+var pointsDiffer = function(one: ?Point, two: ?Point): bool {
   one = one || dummyPoint;
   two = two || dummyPoint;
   return one !== two && (
diff --git a/Libraries/Utilities/groupByEveryN.js b/Libraries/Utilities/groupByEveryN.js
index d1127c1d153cdc..a8b353ad66dde6 100644
--- a/Libraries/Utilities/groupByEveryN.js
+++ b/Libraries/Utilities/groupByEveryN.js
@@ -7,6 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule groupByEveryN
+ * @flow
  */
 
 /**
@@ -26,7 +27,7 @@
  */
 'use strict';
 
-function groupByEveryN(array, n) {
+function groupByEveryN<T>(array: Array<T>, n: number): Array<Array<?T>> {
   var result = [];
   var temp = [];
 
diff --git a/Libraries/Utilities/logError.js b/Libraries/Utilities/logError.js
index 1a0be1a136c989..aac41be0be8369 100644
--- a/Libraries/Utilities/logError.js
+++ b/Libraries/Utilities/logError.js
@@ -7,6 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule logError
+ * @flow
  */
 'use strict';
 
diff --git a/Libraries/Utilities/mergeFast.js b/Libraries/Utilities/mergeFast.js
index 8923167e7e3138..e55ac76ed6a192 100644
--- a/Libraries/Utilities/mergeFast.js
+++ b/Libraries/Utilities/mergeFast.js
@@ -7,6 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule mergeFast
+ * @flow
  */
 'use strict';
 
@@ -19,7 +20,7 @@
  * @return {object} Merging of two objects, including prototype
  * inherited properties.
  */
-var mergeFast = function(one, two) {
+var mergeFast = function(one: Object, two: Object): Object {
   var ret = {};
   for (var keyOne in one) {
     ret[keyOne] = one[keyOne];
diff --git a/Libraries/Utilities/mergeIntoFast.js b/Libraries/Utilities/mergeIntoFast.js
index 666e7384ea5a85..1a97d07b7b17fd 100644
--- a/Libraries/Utilities/mergeIntoFast.js
+++ b/Libraries/Utilities/mergeIntoFast.js
@@ -7,6 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule mergeIntoFast
+ * @flow
  */
 'use strict';
 
@@ -17,7 +18,7 @@
  * @param {object} one Object to assign to.
  * @param {object} two Object to assign from.
  */
-var mergeIntoFast = function(one, two) {
+var mergeIntoFast = function(one: Object, two: Object): void {
   for (var keyTwo in two) {
     one[keyTwo] = two[keyTwo];
   }
diff --git a/Libraries/Utilities/nativeModulePrefixNormalizer.js b/Libraries/Utilities/nativeModulePrefixNormalizer.js
index 3c33fa5033b21c..151417bc5acf00 100644
--- a/Libraries/Utilities/nativeModulePrefixNormalizer.js
+++ b/Libraries/Utilities/nativeModulePrefixNormalizer.js
@@ -7,11 +7,14 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule nativeModulePrefixNormalizer
+ * @flow
  */
 'use strict';
 
 // Dirty hack to support old (RK) and new (RCT) native module name conventions
-function nativeModulePrefixNormalizer(modules) {
+function nativeModulePrefixNormalizer(
+  modules: {[key: string]: any}
+): void {
   Object.keys(modules).forEach((moduleName) => {
     var strippedName = moduleName.replace(/^(RCT|RK)/, '');
     if (modules['RCT' + strippedName] && modules['RK' + strippedName]) {
diff --git a/Libraries/Utilities/truncate.js b/Libraries/Utilities/truncate.js
index b35c0658851ac4..1d318e8353d6b1 100644
--- a/Libraries/Utilities/truncate.js
+++ b/Libraries/Utilities/truncate.js
@@ -7,11 +7,18 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule truncate
+ * @flow
  */
 'use strict';
 
 var merge = require('merge');
 
+type truncateOptions = {
+  breakOnWords: boolean;
+  minDelta: number;
+  elipsis: string;
+}
+
 var defaultOptions = {
   breakOnWords: true,
   minDelta: 10, // Prevents truncating a tiny bit off the end
@@ -19,7 +26,11 @@ var defaultOptions = {
 };
 
 // maxChars (including elipsis)
-var truncate = function(str, maxChars, options) {
+var truncate = function(
+  str: ?string,
+  maxChars: number,
+  options: truncateOptions
+): ?string {
   options = merge(defaultOptions, options);
   if (str && str.length &&
       str.length - options.minDelta + options.elipsis.length >= maxChars) {
diff --git a/Libraries/Vibration/VibrationIOS.ios.js b/Libraries/Vibration/VibrationIOS.ios.js
index c24a50606c4b45..2a1dc701c17383 100644
--- a/Libraries/Vibration/VibrationIOS.ios.js
+++ b/Libraries/Vibration/VibrationIOS.ios.js
@@ -7,6 +7,7 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  *
  * @providesModule VibrationIOS
+ * @flow
  */
 'use strict';
 
diff --git a/Libraries/react-native/react-native.js b/Libraries/react-native/react-native.js
index ea8a25b72fe21e..96080d09fa2067 100644
--- a/Libraries/react-native/react-native.js
+++ b/Libraries/react-native/react-native.js
@@ -42,7 +42,6 @@ var ReactNative = Object.assign(Object.create(require('React')), {
   AlertIOS: require('AlertIOS'),
   Animation: require('Animation'),
   AppRegistry: require('AppRegistry'),
-  AppState: require('AppState'),
   AppStateIOS: require('AppStateIOS'),
   AsyncStorage: require('AsyncStorage'),
   CameraRoll: require('CameraRoll'),
@@ -50,6 +49,7 @@ var ReactNative = Object.assign(Object.create(require('React')), {
   LayoutAnimation: require('LayoutAnimation'),
   NetInfo: require('NetInfo'),
   PixelRatio: require('PixelRatio'),
+  PushNotificationIOS: require('PushNotificationIOS'),
   StatusBarIOS: require('StatusBarIOS'),
   StyleSheet: require('StyleSheet'),
   TimerMixin: require('TimerMixin'),
diff --git a/ReactKit/Base/RCTConvert.h b/ReactKit/Base/RCTConvert.h
index 4e4fee60013b36..66d77e41654efe 100644
--- a/ReactKit/Base/RCTConvert.h
+++ b/ReactKit/Base/RCTConvert.h
@@ -10,9 +10,9 @@
 #import <QuartzCore/QuartzCore.h>
 #import <UIKit/UIKit.h>
 
-#import "../Layout/Layout.h"
-#import "../Views/RCTAnimationType.h"
-#import "../Views/RCTPointerEvents.h"
+#import "Layout.h"
+#import "RCTAnimationType.h"
+#import "RCTPointerEvents.h"
 
 /**
  * This class provides a collection of conversion functions for mapping
diff --git a/ReactKit/Modules/RCTAppState.m b/ReactKit/Modules/RCTAppState.m
index 930d998eba633a..ab44a70a3055ec 100644
--- a/ReactKit/Modules/RCTAppState.m
+++ b/ReactKit/Modules/RCTAppState.m
@@ -87,26 +87,4 @@ - (void)getCurrentAppState:(RCTResponseSenderBlock)callback
   callback(@[@{@"app_state": _lastKnownState}]);
 }
 
-/**
- * Update the application icon badge number on the home screen
- */
-- (void)setApplicationIconBadgeNumber:(NSInteger)number
-{
-  RCT_EXPORT();
-
-  [UIApplication sharedApplication].applicationIconBadgeNumber = number;
-}
-
-/**
- * Get the current application icon badge number on the home screen
- */
-- (void)getApplicationIconBadgeNumber:(RCTResponseSenderBlock)callback
-{
-  RCT_EXPORT();
-
-  callback(@[
-    @([UIApplication sharedApplication].applicationIconBadgeNumber)
-  ]);
-}
-
 @end
diff --git a/ReactKit/Modules/RCTPushNotificationManager.m b/ReactKit/Modules/RCTPushNotificationManager.m
deleted file mode 100644
index 324b8d8ec06312..00000000000000
--- a/ReactKit/Modules/RCTPushNotificationManager.m
+++ /dev/null
@@ -1,71 +0,0 @@
-/**
- * Copyright (c) 2015-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-#import "RCTPushNotificationManager.h"
-
-#import "RCTAssert.h"
-#import "RCTBridge.h"
-#import "RCTEventDispatcher.h"
-
-NSString *const RKRemoteNotificationReceived = @"RemoteNotificationReceived";
-NSString *const RKOpenURLNotification = @"RKOpenURLNotification";
-
-@implementation RCTPushNotificationManager
-{
-  NSDictionary *_initialNotification;
-}
-
-@synthesize bridge = _bridge;
-
-- (instancetype)init
-{
-  return [self initWithInitialNotification:nil];
-}
-
-- (instancetype)initWithInitialNotification:(NSDictionary *)initialNotification
-{
-  if ((self = [super init])) {
-    _initialNotification = [initialNotification copy];
-    [[NSNotificationCenter defaultCenter] addObserver:self
-                                             selector:@selector(handleRemoteNotificationReceived:)
-                                                 name:RKRemoteNotificationReceived
-                                               object:nil];
-    [[NSNotificationCenter defaultCenter] addObserver:self
-                                             selector:@selector(handleOpenURLNotification:)
-                                                 name:RKOpenURLNotification
-                                               object:nil];
-  }
-  return self;
-}
-
-- (void)handleRemoteNotificationReceived:(NSNotification *)notification
-{
-  [_bridge.eventDispatcher sendDeviceEventWithName:@"remoteNotificationReceived"
-                                              body:[notification userInfo]];
-}
-
-- (void)handleOpenURLNotification:(NSNotification *)notification
-{
-  [_bridge.eventDispatcher sendDeviceEventWithName:@"openURL"
-                                              body:[notification userInfo]];
-}
-
-- (NSDictionary *)constantsToExport
-{
-  return @{
-    @"initialNotification": _initialNotification ?: [NSNull null]
-  };
-}
-
-- (void)dealloc
-{
-  [[NSNotificationCenter defaultCenter] removeObserver:self];
-}
-
-@end
diff --git a/ReactKit/Views/RCTShadowView.h b/ReactKit/Views/RCTShadowView.h
index 858a6c80df7609..1a042ee1aaf42a 100644
--- a/ReactKit/Views/RCTShadowView.h
+++ b/ReactKit/Views/RCTShadowView.h
@@ -9,8 +9,7 @@
 
 #import <UIKit/UIKit.h>
 
-#import "../Layout/Layout.h"
-
+#import "Layout.h"
 #import "RCTViewNodeProtocol.h"
 
 @class RCTSparseArray;
diff --git a/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/__tests__/DependencyGraph-test.js b/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/__tests__/DependencyGraph-test.js
index bbdb064175b522..8ebe9c5a630bfb 100644
--- a/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/__tests__/DependencyGraph-test.js
+++ b/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/__tests__/DependencyGraph-test.js
@@ -166,6 +166,69 @@ describe('DependencyGraph', function() {
       });
     });
 
+    pit('should default main package to index.js', function() {
+      var root = '/root';
+      fs.__setMockFilesystem({
+        'root': {
+          'index.js': 'require("aPackage")',
+          'aPackage': {
+            'package.json': JSON.stringify({
+              name: 'aPackage',
+            }),
+            'index.js': 'lol',
+          }
+        }
+      });
+
+      var dgraph = new DependencyGraph({
+        roots: [root],
+        fileWatcher: fileWatcher
+      });
+      return dgraph.load().then(function() {
+        expect(dgraph.getOrderedDependencies('/root/index.js'))
+          .toEqual([
+            {id: '/root/index.js', path: '/root/index.js', dependencies: ['aPackage']},
+            { id: 'aPackage/index',
+              path: '/root/aPackage/index.js',
+              dependencies: []
+            },
+          ]);
+      });
+    });
+
+    pit('should default use index.js if main is a dir', function() {
+      var root = '/root';
+      fs.__setMockFilesystem({
+        'root': {
+          'index.js': 'require("aPackage")',
+          'aPackage': {
+            'package.json': JSON.stringify({
+              name: 'aPackage',
+              main: 'lib',
+            }),
+            lib: {
+              'index.js': 'lol',
+            },
+          }
+        }
+      });
+
+      var dgraph = new DependencyGraph({
+        roots: [root],
+        fileWatcher: fileWatcher
+      });
+      return dgraph.load().then(function() {
+        expect(dgraph.getOrderedDependencies('/root/index.js'))
+          .toEqual([
+            {id: '/root/index.js', path: '/root/index.js', dependencies: ['aPackage']},
+            { id: 'aPackage/lib/index',
+              path: '/root/aPackage/lib/index.js',
+              dependencies: []
+            },
+          ]);
+      });
+    });
+
     pit('should ignore malformed packages', function() {
       var root = '/root';
       fs.__setMockFilesystem({
diff --git a/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/index.js b/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/index.js
index 14139159f66a4f..4622864d28045c 100644
--- a/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/index.js
+++ b/packager/react-packager/src/DependencyResolver/haste/DependencyGraph/index.js
@@ -184,6 +184,12 @@ DependecyGraph.prototype.resolveDependency = function(
     var main = packageJson.main || 'index';
     modulePath = withExtJs(path.join(packageJson._root, main));
     dep = this._graph[modulePath];
+
+    // Some packages use just a dir and rely on an index.js inside that dir.
+    if (dep == null) {
+      dep = this._graph[path.join(packageJson._root, main, 'index.js')];
+    }
+
     if (dep == null) {
       throw new Error(
         'Cannot find package main file for package: ' + packageJson._root
diff --git a/packager/react-packager/src/DependencyResolver/haste/polyfills/require.js b/packager/react-packager/src/DependencyResolver/haste/polyfills/require.js
index e7fdde25023d5f..00955ba4a7e0c9 100644
--- a/packager/react-packager/src/DependencyResolver/haste/polyfills/require.js
+++ b/packager/react-packager/src/DependencyResolver/haste/polyfills/require.js
@@ -196,7 +196,7 @@
     if (!module) {
       msg = 'Requiring unknown module "' + id + '"';
       if (__DEV__) {
-        msg += '. It may not be loaded yet. Did you forget to run arc build?';
+        msg += '. If you are sure the module is there, try restarting the packager.';
       }
       throw new ModuleError(msg);
     }
diff --git a/packager/react-packager/src/Server/__tests__/Server-test.js b/packager/react-packager/src/Server/__tests__/Server-test.js
index 8e638311aa82f3..aa7ca3493a8f81 100644
--- a/packager/react-packager/src/Server/__tests__/Server-test.js
+++ b/packager/react-packager/src/Server/__tests__/Server-test.js
@@ -186,6 +186,7 @@ describe('processRequest', function() {
           expect(packageFunc.mock.calls.length).toBe(1);
           triggerFileChange('all','path/file.js', options.projectRoots[0]);
           jest.runAllTimers();
+          jest.runAllTimers();
         })
         .then(function() {
           expect(packageFunc.mock.calls.length).toBe(2);
diff --git a/packager/react-packager/src/Server/index.js b/packager/react-packager/src/Server/index.js
index cc4f0bdf5d8e3c..19ec003954a01a 100644
--- a/packager/react-packager/src/Server/index.js
+++ b/packager/react-packager/src/Server/index.js
@@ -92,8 +92,10 @@ Server.prototype._rebuildPackages = function() {
   Object.keys(packages).forEach(function(key) {
     var options = getOptionsFromUrl(key);
     // Wait for a previous build (if exists) to finish.
-    packages[key] = (packages[key] || q()).then(function() {
-      return buildPackage(options).then(function(p) {
+    packages[key] = (packages[key] || q()).finally(function() {
+      // With finally promise callback we can't change the state of the promise
+      // so we need to reassign the promise.
+      packages[key] = buildPackage(options).then(function(p) {
         // Make a throwaway call to getSource to cache the source string.
         p.getSource({
           inlineSourceMap: options.dev,
@@ -102,6 +104,7 @@ Server.prototype._rebuildPackages = function() {
         return p;
       });
     });
+    return packages[key];
   });
 };