diff --git a/lib/src/backend/api/request.dart b/lib/src/backend/api/request.dart
index b958d63..4dad8f2 100644
--- a/lib/src/backend/api/request.dart
+++ b/lib/src/backend/api/request.dart
@@ -8,32 +8,31 @@ import 'package:engelsburg_planer/src/backend/api/api_response.dart';
 import 'package:engelsburg_planer/src/backend/api/request_service.dart';
 import 'package:engelsburg_planer/src/backend/api/requests.dart';
 import 'package:engelsburg_planer/src/backend/util/query.dart';
+import 'package:firebase_performance/firebase_performance.dart' show HttpMethod;
 import 'package:flutter/material.dart';
 import 'package:http/http.dart';
 
 typedef Parser<T> = T Function(dynamic json);
 
-enum HttpMethod { get, head, post, put, patch, delete }
-
 Parser ignore = (json) {};
 Parser<dynamic> json = (json) => json;
 
 HttpMethod httpMethodFromString(String method) {
   switch (method) {
     case "get":
-      return HttpMethod.get;
+      return HttpMethod.Get;
     case "head":
-      return HttpMethod.head;
+      return HttpMethod.Head;
     case "put":
-      return HttpMethod.put;
+      return HttpMethod.Put;
     case "post":
-      return HttpMethod.post;
+      return HttpMethod.Post;
     case "patch":
-      return HttpMethod.patch;
+      return HttpMethod.Patch;
     case "delete":
-      return HttpMethod.delete;
+      return HttpMethod.Delete;
     default:
-      return HttpMethod.get;
+      return HttpMethod.Get;
   }
 }
 
@@ -66,8 +65,6 @@ class Request {
   /// Key to cache response of request
   final String? cacheId;
 
-  final void Function(RequestAnalysis)? analytics;
-
   const Request(
     this.method,
     this.host,
@@ -77,7 +74,6 @@ class Request {
     this.headers,
     this.https,
     this.cacheId,
-    this.analytics,
   );
 
   /// Deserialize request
@@ -90,7 +86,6 @@ class Request {
         json["headers"],
         json["https"] == 1,
         json["cacheId"],
-        json["analytics"],
       );
 
   /// Serialize request
@@ -103,7 +98,6 @@ class Request {
         "headers": headers,
         "https": https ? 1 : 0, //Sqflite doesn't support bool
         "cacheId": cacheId,
-        "analytics": analytics,
       };
 
   /// Get RequestBuilder
@@ -136,7 +130,6 @@ class RequestBuilder {
   Map<String, String> _headers = {};
   bool _https = false;
   String? _cacheId;
-  void Function(RequestAnalysis)? _analytics;
 
   /// Build the actual request
   Request build() {
@@ -154,7 +147,6 @@ class RequestBuilder {
       _headers,
       _https,
       _cacheId,
-      _analytics,
     );
   }
 
@@ -165,17 +157,17 @@ class RequestBuilder {
   }
 
   /// Shorthands to set http method
-  RequestBuilder get get => method(HttpMethod.get);
+  RequestBuilder get get => method(HttpMethod.Get);
 
-  RequestBuilder get head => method(HttpMethod.head);
+  RequestBuilder get head => method(HttpMethod.Head);
 
-  RequestBuilder get post => method(HttpMethod.post);
+  RequestBuilder get post => method(HttpMethod.Post);
 
-  RequestBuilder get patch => method(HttpMethod.patch);
+  RequestBuilder get patch => method(HttpMethod.Patch);
 
-  RequestBuilder get put => method(HttpMethod.put);
+  RequestBuilder get put => method(HttpMethod.Put);
 
-  RequestBuilder get delete => method(HttpMethod.delete);
+  RequestBuilder get delete => method(HttpMethod.Delete);
 
   /// Set host
   RequestBuilder host(String host) {
@@ -233,10 +225,4 @@ class RequestBuilder {
     _cacheId = cacheId;
     return this;
   }
-
-  /// Set callback to execute analytics call
-  RequestBuilder analytics(void Function(RequestAnalysis) analytics) {
-    _analytics = analytics;
-    return this;
-  }
 }
diff --git a/lib/src/backend/api/request_service.dart b/lib/src/backend/api/request_service.dart
index 1178b07..77ef1c0 100644
--- a/lib/src/backend/api/request_service.dart
+++ b/lib/src/backend/api/request_service.dart
@@ -7,6 +7,7 @@ import 'package:engelsburg_planer/src/backend/api/request.dart';
 import 'package:engelsburg_planer/src/backend/api/requests.dart';
 import 'package:engelsburg_planer/src/backend/database/state/network_state.dart';
 import 'package:engelsburg_planer/src/utils/global_context.dart';
+import 'package:firebase_performance/firebase_performance.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:http/http.dart' as http;
 import 'package:provider/provider.dart';
@@ -33,17 +34,21 @@ class RequestService {
   ///
   /// Will return empty body and status 0 after defined (default 5) timeout
   static Future<http.Response> execute(Request request, {Duration timeout = kTimeout}) async {
-    var stopwatch = Stopwatch()..start();
     //Set network status loading
     globalContext().read<NetworkState>().update(NetworkStatus.loading);
 
     //Set default headers if api request
     if (request.host == Host.api) request.headers.addAll(defaultApiHeaders);
-    //Set authorization header if request is an authenticated one
 
     //Append Hash-header if needed (modified check)
     request = appendModifiedCheck(request);
-    var prepareTime = stopwatch.elapsedMilliseconds;
+
+    //Log performance of request
+    HttpMetric metric = FirebasePerformance.instance.newHttpMetric(
+      request.toUri().toString(),
+      request.method,
+    );
+    metric.start();
 
     //Execute request
     //TODO? create retry service? (callback?), exponential backoff?
@@ -52,25 +57,22 @@ class RequestService {
         .onError((error, stackTrace) => http.Response("", 999))
         .timeout(timeout, onTimeout: () => http.Response("", 999))
         .then((response) {
-      stopwatch.stop();
+      metric.httpResponseCode = response.statusCode;
+      metric.responseContentType = response.headers["Content-Type"];
+      metric.requestPayloadSize = response.request?.contentLength;
 
-      RequestAnalysis analysis;
       if (response.statusCode == 999) {
-        globalContext().read<NetworkState>().update(NetworkStatus.offline);
+        metric.responsePayloadSize = 0;
+        metric.stop();
 
-        analysis = RequestAnalysis.timedOut(prepareTime);
+        globalContext().read<NetworkState>().update(NetworkStatus.offline);
       } else {
+        metric.responsePayloadSize = response.contentLength;
+        metric.stop();
+
         //If request wasn't timed out then set network status as online
         globalContext().read<NetworkState>().update(NetworkStatus.online);
-
-        analysis = RequestAnalysis(
-          prepareTime: prepareTime,
-          responseTime: stopwatch.elapsedMilliseconds - prepareTime,
-          responseSize: response.contentLength,
-          timedOut: false,
-        );
       }
-      request.analytics?.call(analysis);
 
       return response;
     });
@@ -85,18 +87,20 @@ class RequestService {
 
     //Execute request
     switch (request.method) {
-      case HttpMethod.get:
+      case HttpMethod.Get:
         return await http.get(uri, headers: headers); //GET
-      case HttpMethod.head:
+      case HttpMethod.Head:
         return await http.head(uri, headers: headers); //HEAD
-      case HttpMethod.post:
+      case HttpMethod.Post:
         return await http.post(uri, headers: headers, body: body); //POST
-      case HttpMethod.put:
+      case HttpMethod.Put:
         return await http.put(uri, headers: headers, body: body); //PUT
-      case HttpMethod.patch:
+      case HttpMethod.Patch:
         return await http.patch(uri, headers: headers, body: body); //PATCH
-      case HttpMethod.delete:
+      case HttpMethod.Delete:
         return await http.delete(uri, headers: headers, body: body); //DELETE
+      default:
+        throw FlutterError("Unsupported http method: ${request.method}");
     }
   }
 
@@ -117,23 +121,3 @@ class RequestService {
     */
   }
 }
-
-@immutable
-class RequestAnalysis {
-  final int prepareTime;
-  final int? responseTime;
-  final int? responseSize;
-  final bool timedOut;
-
-  const RequestAnalysis({
-    required this.prepareTime,
-    required this.responseTime,
-    required this.responseSize,
-    required this.timedOut,
-  }) : assert(timedOut || responseTime != null);
-
-  const RequestAnalysis.timedOut(this.prepareTime)
-      : timedOut = true,
-        responseTime = null,
-        responseSize = null;
-}
diff --git a/lib/src/backend/api/requests.dart b/lib/src/backend/api/requests.dart
index b5e015c..3f3d78e 100644
--- a/lib/src/backend/api/requests.dart
+++ b/lib/src/backend/api/requests.dart
@@ -7,7 +7,6 @@ import 'package:engelsburg_planer/src/backend/api/model/dto/update_notification_
 import 'package:engelsburg_planer/src/backend/api/request.dart';
 import 'package:engelsburg_planer/src/backend/util/paging.dart';
 import 'package:engelsburg_planer/src/backend/util/query.dart';
-import 'package:engelsburg_planer/src/services/firebase/analytics.dart';
 import 'package:flutter/foundation.dart';
 
 ///
@@ -77,15 +76,12 @@ RequestBuilder getArticles({int? date, Paging paging = const Paging(0, 20)}) =>
     .get
     .path(Path.article)
     .params(Query.paging(paging) + Query.date(date))
-    .cache("articles_${paging.page}_${paging.size}_$date")
-    .analytics(Analytics.api.article);
+    .cache("articles_${paging.page}_${paging.size}_$date");
 
-RequestBuilder getArticle(int id) => Request.builder().https.api.get.path("${Path.article}/$id")
-    .analytics(Analytics.api.article);
+RequestBuilder getArticle(int id) => Request.builder().https.api.get.path("${Path.article}/$id");
 
 RequestBuilder getChangedArticles(List<String> hashes) =>
-    Request.builder().https.api.patch.path(Path.article).jsonBody({"hashes": hashes})
-        .analytics(Analytics.api.article);
+    Request.builder().https.api.patch.path(Path.article).jsonBody({"hashes": hashes});
 
 ///
 /// Substitutes
@@ -105,8 +101,7 @@ RequestBuilder getSubstitutes(
           classes: classes,
           teacher: teacher,
         ))
-        .cache("substitutes-$classes-$teacher")
-        .analytics(Analytics.api.substitute);
+        .cache("substitutes-$classes-$teacher");
 
 RequestBuilder getSubstituteMessages(String substituteKey) => Request.builder()
     .https
@@ -114,12 +109,10 @@ RequestBuilder getSubstituteMessages(String substituteKey) => Request.builder()
     .get
     .path(Path.substitute.messages)
     .params(Query.substitutes(substituteKey))
-    .cache("substitute_messages")
-    .analytics(Analytics.api.substitute);
+    .cache("substitute_messages");
 
 RequestBuilder getSubstituteKeyHash() =>
-    Request.builder().https.api.get.path(Path.substitute.keyHash).cache("substitute_key_hash")
-        .analytics(Analytics.api.substitute);
+    Request.builder().https.api.get.path(Path.substitute.keyHash).cache("substitute_key_hash");
 
 ///
 /// Information
@@ -131,8 +124,7 @@ RequestBuilder getTeacher(String substituteKey) => Request.builder()
     .get
     .path(Path.info.teacher)
     .params(Query.substitutes(substituteKey))
-    .cache("info_teacher")
-    .analytics(Analytics.api.info);
+    .cache("info_teacher");
 
 RequestBuilder getClasses(String substituteKey) => Request.builder()
     .https
@@ -140,8 +132,7 @@ RequestBuilder getClasses(String substituteKey) => Request.builder()
     .get
     .path(Path.info.classes)
     .params(Query.substitutes(substituteKey))
-    .cache("info_classes")
-    .analytics(Analytics.api.info);
+    .cache("info_classes");
 
 ///
 /// Notification
@@ -152,23 +143,18 @@ RequestBuilder updateNotificationSettings(String token, Iterable<String> priorit
         .api
         .post
         .path(Path.notificationSettings)
-        .jsonBody(UpdateNotificationSettingsDTO(token: token, priorityTopics: priorityTopics))
-        .analytics(Analytics.api.notificationSettings);
+        .jsonBody(UpdateNotificationSettingsDTO(token: token, priorityTopics: priorityTopics));
 
 RequestBuilder deleteNotificationSettings(String token) =>
-    Request.builder().https.api.delete.path(Path.notificationSettings).param("token", token)
-        .analytics(Analytics.api.notificationSettings);
+    Request.builder().https.api.delete.path(Path.notificationSettings).param("token", token);
 
 ///
 /// Other
 ///
-RequestBuilder getEvents() => Request.builder().https.api.get.path(Path.event).cache("event")
-    .analytics(Analytics.api.events);
+RequestBuilder getEvents() => Request.builder().https.api.get.path(Path.event).cache("event");
 
 RequestBuilder getCafeteria() =>
-    Request.builder().https.api.get.path(Path.cafeteria).cache("cafeteria")
-        .analytics(Analytics.api.cafeteria);
+    Request.builder().https.api.get.path(Path.cafeteria).cache("cafeteria");
 
 RequestBuilder getSolarSystem() =>
-    Request.builder().https.api.get.path(Path.solarSystem).cache("solar_system")
-        .analytics(Analytics.api.solar);
+    Request.builder().https.api.get.path(Path.solarSystem).cache("solar_system");
diff --git a/lib/src/services/firebase/analytics.dart b/lib/src/services/firebase/analytics.dart
index a2a7baa..cecf43f 100644
--- a/lib/src/services/firebase/analytics.dart
+++ b/lib/src/services/firebase/analytics.dart
@@ -3,7 +3,6 @@
  */
 
 import 'package:engelsburg_planer/src/backend/api/model/article.dart';
-import 'package:engelsburg_planer/src/backend/api/request_service.dart';
 import 'package:engelsburg_planer/src/backend/database/nosql/storage/interceptor/analytics_interceptor.dart';
 import 'package:engelsburg_planer/src/backend/database/state/app_state.dart';
 import 'package:engelsburg_planer/src/utils/util.dart';
@@ -20,7 +19,6 @@ class Analytics {
   static final UserAnalytics user = UserAnalytics(_analytics);
   static final InteractionAnalytics interaction =
       InteractionAnalytics(_analytics);
-  static final ApiAnalytics api = ApiAnalytics(_analytics);
 
   static void initialize() => _analytics.setDefaultEventParameters({
         if (kDebugMode) "debug_mode": kDebugMode.toString(),
@@ -30,41 +28,6 @@ class Analytics {
   static void logAppOpen() => _analytics.logAppOpen();
 }
 
-/// Analytics label for api calls
-class ApiAnalytics {
-  final FirebaseAnalytics _analytics;
-
-  ApiAnalytics(this._analytics);
-
-  void _request(String type, RequestAnalysis analysis) => _analytics.logEvent(
-        name: "api_request",
-        parameters: {
-          "api_request_type": type,
-          "api_request_prepare_time": analysis.prepareTime,
-          "api_request_timed_out": analysis.timedOut.toString(),
-          if (analysis.responseTime != null)
-            "api_response_time": analysis.responseTime,
-          if (analysis.responseSize != null)
-          "api_response_size": analysis.responseSize,
-        },
-      );
-
-  void article(RequestAnalysis analysis) => _request("article", analysis);
-
-  void substitute(RequestAnalysis analysis) => _request("substitute", analysis);
-
-  void notificationSettings(RequestAnalysis analysis) =>
-      _request("notification_settings", analysis);
-
-  void cafeteria(RequestAnalysis analysis) => _request("cafeteria", analysis);
-
-  void events(RequestAnalysis analysis) => _request("events", analysis);
-
-  void solar(RequestAnalysis analysis) => _request("solar", analysis);
-
-  void info(RequestAnalysis analysis) => _request("info", analysis);
-}
-
 class InteractionAnalytics {
   final FirebaseAnalytics _analytics;