diff --git a/src/App.tsx b/src/App.tsx
index 81e011f432..6f28249032 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,26 +1,180 @@
-/* eslint-disable max-len */
+/* eslint-disable jsx-a11y/label-has-associated-control */
 /* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import React, { useEffect, useRef, useState } from 'react';
 import { UserWarning } from './UserWarning';
+import * as clientTodo from './api/todos';
+import { getFilteredTodos } from './utils/getFilteredTodos';
 
-const USER_ID = 0;
+import { ErrorMessage } from './types/ErrorMessage';
+import { Todo } from './types/Todo';
+import { Status } from './types/Status';
+
+import { TodoHeader } from './components/TodoHeader';
+import { TodoFooter } from './components/TodoFooter';
+import { TodoItem } from './components/TodoItem';
+import { ErrorNotification } from './components/ErrorNotification';
 
 export const App: React.FC = () => {
-  if (!USER_ID) {
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [activeStatus, setActiveStatus] = useState(Status.All);
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [isLoadingTodos, setIsLoadingTodos] = useState<number[]>([]);
+  const [errorMessage, setErrorMessage] = useState<ErrorMessage>(
+    ErrorMessage.Default,
+  );
+
+  const inputRef = useRef<HTMLInputElement | null>(null);
+
+  const filteredTodos = getFilteredTodos(todos, activeStatus);
+  const notCompletedTodos = todos.filter(todo => !todo.completed);
+  const completedTodos = todos.filter(todo => todo.completed);
+  const isToogleAll =
+    todos.length !== 0 ? completedTodos.length === todos.length : false;
+
+  const onAddTodo = async (title: string) => {
+    setTempTodo({
+      id: 0,
+      title,
+      userId: clientTodo.USER_ID,
+      completed: false,
+    });
+
+    const newTodo: Omit<Todo, 'id'> = {
+      title,
+      userId: clientTodo.USER_ID,
+      completed: false,
+    };
+
+    try {
+      const todo = await clientTodo.createTodos(newTodo);
+
+      setTodos(currentTodos => [...currentTodos, todo]);
+    } catch (error) {
+      setErrorMessage(ErrorMessage.UnableToAdd);
+      throw error;
+    } finally {
+      setTempTodo(null);
+    }
+  };
+
+  const onUpdateTodo = async (todoToUpdate: Todo) => {
+    setIsLoadingTodos(prevTodos => [...prevTodos, todoToUpdate.id]);
+
+    try {
+      const updatedTodo = await clientTodo.updateTodo(todoToUpdate);
+
+      setTodos(currentTodos => {
+        const newTodos = [...currentTodos];
+        const index = newTodos.findIndex(todo => todo.id === updatedTodo.id);
+
+        newTodos.splice(index, 1, updatedTodo);
+
+        return newTodos;
+      });
+    } catch (error) {
+      setErrorMessage(ErrorMessage.UnableToUpdate);
+      throw error;
+    } finally {
+      setIsLoadingTodos(prevTodos => prevTodos.filter(id => todoToUpdate.id !== id));
+    }
+  };
+
+  const onDeleteTodo = (todoId: number) => {
+    setIsLoadingTodos(prevTodos => [...prevTodos, todoId]);
+
+    clientTodo
+      .deleteTodo(todoId)
+      .then(() =>
+        setTodos(currentTodos =>
+          currentTodos.filter(todo => todo.id !== todoId),
+        ),
+      )
+      .catch(error => {
+        setErrorMessage(ErrorMessage.UnableToDelete);
+        throw error;
+      })
+      .finally(() =>
+        setIsLoadingTodos(prevTodos => prevTodos.filter(id => todoId !== id)),
+      );
+  };
+
+  const onDeleteAllCompleted = () => {
+    completedTodos.forEach(todo => onDeleteTodo(todo.id));
+  };
+
+  const onToggleAll = () => {
+    if (todos.every(todo => todo.completed)) {
+      todos.forEach(todo => onUpdateTodo({ ...todo, completed: false }));
+    } else {
+      todos.forEach(todo => onUpdateTodo({ ...todo, completed: true }));
+    }
+  };
+
+  useEffect(() => {
+    clientTodo
+      .getTodos()
+      .then(data => setTodos(data))
+      .catch(error => {
+        setErrorMessage(ErrorMessage.UnableToLoad);
+        throw error;
+      });
+  }, []);
+
+  if (!clientTodo.USER_ID) {
     return <UserWarning />;
   }
 
   return (
-    <section className="section container">
-      <p className="title is-4">
-        Copy all you need from the prev task:
-        <br />
-        <a href="https://github.com/mate-academy/react_todo-app-add-and-delete#react-todo-app-add-and-delete">
-          React Todo App - Add and Delete
-        </a>
-      </p>
-
-      <p className="subtitle">Styles are already copied</p>
-    </section>
+    <div className="todoapp">
+      <h1 className="todoapp__title">todos</h1>
+
+      <div className="todoapp__content">
+        <TodoHeader
+          inputRef={inputRef}
+          error={errorMessage}
+          isToogleAll={isToogleAll}
+          isInputDisablet={!!tempTodo}
+          isDeletedTodos={isLoadingTodos}
+          onAddTodo={onAddTodo}
+          onToggleAll={onToggleAll}
+          setErrorMessage={setErrorMessage}
+        />
+
+        <section className="todoapp__main" data-cy="TodoList">
+          {filteredTodos.map(todo => (
+            <TodoItem
+              key={todo.id}
+              todo={todo}
+              onDeleteTodo={onDeleteTodo}
+              onUpdateTodo={onUpdateTodo}
+              isLoading={isLoadingTodos.includes(todo.id)}
+            />
+          ))}
+          {tempTodo && (
+            <TodoItem
+              todo={tempTodo}
+              onDeleteTodo={onDeleteTodo}
+              onUpdateTodo={onUpdateTodo}
+              isLoading={isLoadingTodos.includes(tempTodo.id)}
+            />
+          )}
+        </section>
+
+        {!!todos.length && (
+          <TodoFooter
+            activeStatus={activeStatus}
+            completedTodos={completedTodos.length}
+            notCompletedTodos={notCompletedTodos.length}
+            onDeleteAllCompleted={onDeleteAllCompleted}
+            setActiveStatus={setActiveStatus}
+          />
+        )}
+      </div>
+
+      <ErrorNotification
+        error={errorMessage}
+        setErrorMessage={setErrorMessage}
+      />
+    </div>
   );
 };
diff --git a/src/api/todos.ts b/src/api/todos.ts
new file mode 100644
index 0000000000..bbf7c07042
--- /dev/null
+++ b/src/api/todos.ts
@@ -0,0 +1,20 @@
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+export const USER_ID = 2135;
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`/todos?userId=${USER_ID}`);
+};
+
+export const createTodos = ({ title, userId, completed }: Omit<Todo, 'id'>) => {
+  return client.post<Todo>(`/todos`, { title, userId, completed });
+};
+
+export const deleteTodo = (id: number) => {
+  return client.delete(`/todos/${id}`);
+};
+
+export const updateTodo = ({ id, title, completed, userId }: Todo) => {
+  return client.patch<Todo>(`/todos/${id}`, { title, completed, userId });
+};
diff --git a/src/components/ErrorNotification.tsx b/src/components/ErrorNotification.tsx
new file mode 100644
index 0000000000..f8c8081dc3
--- /dev/null
+++ b/src/components/ErrorNotification.tsx
@@ -0,0 +1,45 @@
+import React, { useEffect } from 'react';
+import cn from 'classnames';
+import { ErrorMessage } from '../types/ErrorMessage';
+
+type Props = {
+  error: string;
+  setErrorMessage: (error: ErrorMessage) => void;
+};
+
+export const ErrorNotification: React.FC<Props> = props => {
+  const { error, setErrorMessage } = props;
+
+  useEffect(() => {
+    if (error === ErrorMessage.Default) {
+      return;
+    }
+
+    const timer = setTimeout(() => {
+      setErrorMessage(ErrorMessage.Default);
+    }, 3000);
+
+    return () => clearTimeout(timer);
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [error]);
+
+  return (
+    <div
+      data-cy="ErrorNotification"
+      className={cn(
+        'notification',
+        'is-danger',
+        'is-light has-text-weight-normal',
+        { hidden: !error },
+      )}
+    >
+      <button
+        data-cy="HideErrorButton"
+        type="button"
+        className="delete"
+        onClick={() => setErrorMessage}
+      />
+      {error}
+    </div>
+  );
+};
diff --git a/src/components/TodoFooter.tsx b/src/components/TodoFooter.tsx
new file mode 100644
index 0000000000..3dea92932d
--- /dev/null
+++ b/src/components/TodoFooter.tsx
@@ -0,0 +1,56 @@
+/* eslint-disable prettier/prettier */
+import React from 'react';
+import cn from 'classnames';
+import { Status } from '../types/Status';
+
+type Props = {
+  activeStatus: Status;
+  completedTodos: number;
+  notCompletedTodos: number;
+  onDeleteAllCompleted: () => void;
+  setActiveStatus: (status: Status) => void;
+};
+
+export const TodoFooter: React.FC<Props> = props => {
+  const {
+    activeStatus,
+    completedTodos,
+    notCompletedTodos,
+    onDeleteAllCompleted,
+    setActiveStatus,
+  } = props;
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {notCompletedTodos} items left
+      </span>
+
+      <nav className="filter" data-cy="Filter">
+        {Object.values(Status).map(status => (
+          <a
+            key={status}
+            data-cy={`FilterLink${status}`}
+            href={status === 'All' ? '#/' : `#/${status.toLowerCase()}`}
+            className={cn('filter__link', {
+              selected: activeStatus === status,
+            })}
+            onClick={() => setActiveStatus(status)}
+          >
+            {status}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        disabled={completedTodos === 0}
+        onClick={onDeleteAllCompleted}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};
diff --git a/src/components/TodoHeader.tsx b/src/components/TodoHeader.tsx
new file mode 100644
index 0000000000..2080f8da04
--- /dev/null
+++ b/src/components/TodoHeader.tsx
@@ -0,0 +1,76 @@
+import React, { useEffect, useState } from 'react';
+import cn from 'classnames';
+import { ErrorMessage } from '../types/ErrorMessage';
+
+type Props = {
+  inputRef: React.MutableRefObject<HTMLInputElement | null>;
+  error: ErrorMessage;
+  isToogleAll: boolean;
+  isInputDisablet: boolean;
+  isDeletedTodos: number[];
+  onAddTodo: (title: string) => Promise<void>;
+  onToggleAll: () => void;
+  setErrorMessage: (error: ErrorMessage) => void;
+};
+
+export const TodoHeader: React.FC<Props> = props => {
+  const {
+    inputRef,
+    error,
+    isToogleAll,
+    isInputDisablet,
+    isDeletedTodos,
+    onAddTodo,
+    onToggleAll,
+    setErrorMessage,
+  } = props;
+
+  const [title, setTitle] = useState('');
+
+  useEffect(() => {
+    if (inputRef.current) {
+      inputRef.current.focus();
+    }
+  }, [inputRef, isInputDisablet, isDeletedTodos]);
+
+  const handleSubmit = async (event: React.FormEvent<HTMLFormElement>) => {
+    event.preventDefault();
+
+    if (error) {
+      setErrorMessage(ErrorMessage.Default);
+    }
+
+    if (!title.trim()) {
+      setErrorMessage(ErrorMessage.EmptyTitle);
+
+      return;
+    }
+
+    await onAddTodo(title.trim());
+    setTitle('');
+  };
+
+  return (
+    <header className="todoapp__header">
+      <button
+        type="button"
+        className={cn('todoapp__toggle-all', { active: isToogleAll })}
+        data-cy="ToggleAllButton"
+        onClick={onToggleAll}
+      />
+
+      <form onSubmit={handleSubmit}>
+        <input
+          data-cy="NewTodoField"
+          type="text"
+          className="todoapp__new-todo"
+          placeholder="What needs to be done?"
+          ref={inputRef}
+          value={title}
+          onChange={event => setTitle(event.target.value)}
+          disabled={isInputDisablet}
+        />
+      </form>
+    </header>
+  );
+};
diff --git a/src/components/TodoItem.tsx b/src/components/TodoItem.tsx
new file mode 100644
index 0000000000..8b299f9986
--- /dev/null
+++ b/src/components/TodoItem.tsx
@@ -0,0 +1,142 @@
+/* eslint-disable @typescript-eslint/indent */
+/* eslint-disable jsx-a11y/label-has-associated-control */
+import React, { useEffect, useRef, useState } from 'react';
+import cn from 'classnames';
+import { USER_ID } from '../api/todos';
+import { Todo } from '../types/Todo';
+
+type Props = {
+  todo: Todo;
+  onDeleteTodo: (todoId: number) => void;
+  onUpdateTodo: (newTodo: Todo) => Promise<void>;
+  isLoading: boolean;
+};
+
+export const TodoItem: React.FC<Props> = props => {
+  const { todo, onDeleteTodo, onUpdateTodo, isLoading } = props;
+
+  const [isUpdate, setIsUpdate] = useState(false);
+  const [updateTitle, setUpdateTitle] = useState(todo.title);
+
+  const updateRef = useRef<HTMLInputElement>(null);
+
+  const handleUpdate = async (
+    e:
+      | React.FormEvent<HTMLFormElement>
+      | React.FocusEvent<HTMLInputElement, Element>,
+  ) => {
+    e.preventDefault();
+
+    if (todo.title === updateTitle) {
+      setIsUpdate(false);
+
+      return;
+    }
+
+    if (!updateTitle) {
+      onDeleteTodo(todo.id);
+    }
+
+    const updatedTodo: Todo = {
+      id: todo.id,
+      completed: todo.completed,
+      title: updateTitle,
+      userId: USER_ID,
+    };
+
+    try {
+      await onUpdateTodo(updatedTodo);
+    } catch (err) {
+      throw err;
+    } finally {
+      setIsUpdate(false);
+    }
+  };
+
+  useEffect(() => {
+    if (updateRef.current) {
+      updateRef.current.focus();
+    }
+  }, [isUpdate]);
+
+  useEffect(() => {
+    const handleEscape = (event: KeyboardEvent) => {
+      event.preventDefault();
+      if (event.key === 'Escape') {
+        setUpdateTitle(todo.title);
+        setIsUpdate(false);
+      }
+    };
+
+    document.addEventListener('keyup', handleEscape);
+
+    return () => {
+      document.removeEventListener('keyup', handleEscape);
+    };
+  }, [todo.title]);
+
+  const handleComplete = (event: React.ChangeEvent<HTMLInputElement>) => {
+    event.preventDefault();
+
+    onUpdateTodo({ ...todo, completed: !todo.completed });
+  };
+
+  return (
+    <div data-cy="Todo" className={cn('todo', { completed: todo.completed })}>
+      <label className="todo__status-label">
+        <input
+          data-cy="TodoStatus"
+          type="checkbox"
+          className="todo__status"
+          checked={todo.completed}
+          onChange={handleComplete}
+        />
+      </label>
+
+      {isUpdate ? (
+        <form onSubmit={handleUpdate}>
+          <input
+            data-cy="TodoTitleField"
+            type="text"
+            className="todo__title-field"
+            placeholder="Empty todo will be deleted"
+            value={updateTitle}
+            onChange={e => setUpdateTitle(e.target.value)}
+            ref={updateRef}
+            onBlur={handleUpdate}
+          />
+        </form>
+      ) : (
+        <>
+          <span
+            data-cy="TodoTitle"
+            className="todo__title"
+            onDoubleClick={() => setIsUpdate(true)}
+          >
+            {todo.title}
+          </span>
+
+          <button
+            type="button"
+            className="todo__remove"
+            data-cy="TodoDelete"
+            onClick={() => onDeleteTodo(todo.id)}
+            disabled={isLoading}
+          >
+            ×
+          </button>
+        </>
+      )}
+
+      <div
+        data-cy="TodoLoader"
+        className={cn('modal overlay', {
+          'is-active': isLoading || todo.id === 0,
+        })}
+      >
+        <div className="modal-background has-background-white-ter" />
+        <div className="loader" />
+      </div>
+    </div>
+  );
+};
diff --git a/src/types/ErrorMessage.ts b/src/types/ErrorMessage.ts
new file mode 100644
index 0000000000..f74d2716fa
--- /dev/null
+++ b/src/types/ErrorMessage.ts
@@ -0,0 +1,8 @@
+export enum ErrorMessage {
+  Default = '',
+  EmptyTitle = 'Title should not be empty',
+  UnableToAdd = 'Unable to add a todo',
+  UnableToLoad = 'Unable to load todos',
+  UnableToDelete = 'Unable to delete a todo',
+  UnableToUpdate = 'Unable to update a todo',
+}
diff --git a/src/types/Status.ts b/src/types/Status.ts
new file mode 100644
index 0000000000..dc864cc93b
--- /dev/null
+++ b/src/types/Status.ts
@@ -0,0 +1,5 @@
+export enum Status {
+  All = 'All',
+  Active = 'Active',
+  Completed = 'Completed',
+}
diff --git a/src/types/Todo.ts b/src/types/Todo.ts
new file mode 100644
index 0000000000..3f52a5fdde
--- /dev/null
+++ b/src/types/Todo.ts
@@ -0,0 +1,6 @@
+export interface Todo {
+  id: number;
+  userId: number;
+  title: string;
+  completed: boolean;
+}
diff --git a/src/utils/fetchClient.ts b/src/utils/fetchClient.ts
new file mode 100644
index 0000000000..708ac4c17b
--- /dev/null
+++ b/src/utils/fetchClient.ts
@@ -0,0 +1,46 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+const BASE_URL = 'https://mate.academy/students-api';
+
+// returns a promise resolved after a given delay
+function wait(delay: number) {
+  return new Promise(resolve => {
+    setTimeout(resolve, delay);
+  });
+}
+
+// To have autocompletion and avoid mistypes
+type RequestMethod = 'GET' | 'POST' | 'PATCH' | 'DELETE';
+
+function request<T>(
+  url: string,
+  method: RequestMethod = 'GET',
+  data: any = null, // we can send any data to the server
+): Promise<T> {
+  const options: RequestInit = { method };
+
+  if (data) {
+    // We add body and Content-Type only for the requests with data
+    options.body = JSON.stringify(data);
+    options.headers = {
+      'Content-Type': 'application/json; charset=UTF-8',
+    };
+  }
+
+  // DON'T change the delay it is required for tests
+  return wait(100)
+    .then(() => fetch(BASE_URL + url, options))
+    .then(response => {
+      if (!response.ok) {
+        throw new Error();
+      }
+
+      return response.json();
+    });
+}
+
+export const client = {
+  get: <T>(url: string) => request<T>(url),
+  post: <T>(url: string, data: any) => request<T>(url, 'POST', data),
+  patch: <T>(url: string, data: any) => request<T>(url, 'PATCH', data),
+  delete: (url: string) => request(url, 'DELETE'),
+};
diff --git a/src/utils/getFilteredTodos.ts b/src/utils/getFilteredTodos.ts
new file mode 100644
index 0000000000..308c1b65b3
--- /dev/null
+++ b/src/utils/getFilteredTodos.ts
@@ -0,0 +1,15 @@
+import { Status } from '../types/Status';
+import { Todo } from '../types/Todo';
+
+export const getFilteredTodos = (todos: Todo[], status: Status) =>
+  todos.filter(todo => {
+    if (status === Status.Completed) {
+      return todo.completed;
+    }
+
+    if (status === Status.Active) {
+      return !todo.completed;
+    }
+
+    return true;
+  });