diff --git a/README.md b/README.md
index d3c3756ab9..c4ad68b56f 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,7 @@ and implement the ability to toggle and rename todos.
 ## Toggling a todo status
 
 Toggle the `completed` status on `TodoStatus` change:
+
 - Install Prettier Extention and use this [VSCode settings](https://mate-academy.github.io/fe-program/tools/vscode/settings.json) to enable format on save.
 - covered the todo with a loader overlay while waiting for API response;
 - the status should be changed on success;
@@ -38,6 +39,7 @@ Implement the ability to edit a todo title on double click:
 - or the deletion error message if we tried to delete the todo.
 
 ## If you want to enable tests
+
 - open `cypress/integration/page.spec.js`
 - replace `describe.skip` with `describe` for the root `describe`
 
@@ -47,4 +49,4 @@ Implement the ability to edit a todo title on double click:
 
 - Implement a solution following the [React task guideline](https://github.com/mate-academy/react_task-guideline#react-tasks-guideline).
 - Use the [React TypeScript cheat sheet](https://mate-academy.github.io/fe-program/js/extra/react-typescript).
-- Replace `<your_account>` with your Github username in the [DEMO LINK](https://<your_account>.github.io/react_todo-app-with-api/) and add it to the PR description.
+- Replace `<your_account>` with your Github username in the [DEMO LINK](https://OkMoroz.github.io/react_todo-app-with-api/) and add it to the PR description.
diff --git a/src/App.tsx b/src/App.tsx
index 81e011f432..5260689a8d 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -1,26 +1,186 @@
-/* eslint-disable max-len */
-/* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
-import { UserWarning } from './UserWarning';
+import React, { useState, useEffect } from 'react';
+import { addTodo, deleteTodo, getTodos, updateTodo } from './api/todos';
 
-const USER_ID = 0;
+import { Header } from './components/Header';
+import { TodoList } from './components/TodoList';
+import { Footer } from './components/Footer';
+import { Errors } from './components/Errors';
+
+import { loadingObject } from './utils/loadingObject';
+import { filteredTodos } from './utils/filteredTodos';
+
+import { Todo } from './types/Todo';
+import { ErrorMessage } from './types/enum/Errors';
+import { Loading } from './types/Loading';
+import { Filters } from './types/enum/Filters';
 
 export const App: React.FC = () => {
-  if (!USER_ID) {
-    return <UserWarning />;
-  }
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [errorMessage, setErrorMessage] = useState<ErrorMessage>(
+    ErrorMessage.Default,
+  );
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [filter, setFilter] = useState<Filters>(Filters.All);
+  const [loadingId, setLoadingId] = useState<Loading>({});
+
+  useEffect(() => {
+    const timeoutId = setTimeout(
+      () => setErrorMessage(ErrorMessage.Default),
+      3000,
+    );
+
+    getTodos()
+      .then(setTodos)
+      .catch(() => {
+        setErrorMessage(ErrorMessage.UnableToLoad);
+        clearTimeout(timeoutId);
+      });
+
+    return () => clearTimeout(timeoutId);
+  }, []);
+
+  const handleAdd = (newTodo: Todo): Promise<void> => {
+    setTempTodo(newTodo);
+
+    return addTodo(newTodo).then(newTodoRes => {
+      setTodos(currentTodos => [...currentTodos, newTodoRes]);
+    });
+  };
+
+  const updateCompleted = (
+    updatedTodo: Todo,
+    key: keyof Todo,
+    value: boolean | string,
+  ) => {
+    return updateTodo({ ...updatedTodo, [key]: value })
+      .then((updatedTodoFromServer: Todo) => {
+        setTodos(currentTodos => {
+          return currentTodos.map(todo =>
+            todo.id === updatedTodo.id ? updatedTodoFromServer : todo,
+          );
+        });
+
+        return false;
+      })
+      .catch(() => {
+        setErrorMessage(ErrorMessage.UnableToUpdate);
+
+        return true;
+      });
+  };
+
+  const handleToggleAll = () => {
+    const activeTodos = todos.filter(todo => !todo.completed);
+    const activeTodosIds = loadingObject(activeTodos);
+
+    if (activeTodos.length) {
+      setLoadingId(activeTodosIds);
+
+      Promise.all(
+        activeTodos.map(todo => updateTodo({ ...todo, completed: true })),
+      )
+        .then(() =>
+          setTodos(currentTodos => {
+            return currentTodos.map(todo => {
+              if (Object.hasOwn(activeTodosIds, todo.id)) {
+                return { ...todo, completed: true };
+              } else {
+                return todo;
+              }
+            });
+          }),
+        )
+        .catch(() => setErrorMessage(ErrorMessage.UnableToUpdate))
+        .finally(() => setLoadingId({}));
+
+      return;
+    }
+
+    setLoadingId(loadingObject(todos));
+    Promise.all(todos.map(todo => updateTodo({ ...todo, completed: false })))
+      .then(() =>
+        setTodos(prevTodos => {
+          return prevTodos.map(todo => ({ ...todo, completed: false }));
+        }),
+      )
+      .catch(() => setErrorMessage(ErrorMessage.UnableToUpdate))
+      .finally(() => setLoadingId({}));
+  };
+
+  const handleDeleteCompleted = () => {
+    const completedTodos = todos.filter(todo => todo.completed);
+
+    setLoadingId(loadingObject(completedTodos));
+
+    Promise.allSettled(
+      completedTodos.map(todo => deleteTodo(todo.id).then(() => todo)),
+    )
+      .then(values => {
+        values.map(val => {
+          if (val.status === 'rejected') {
+            setErrorMessage(ErrorMessage.UnableToDelete);
+          } else {
+            setTodos(currentTodos => {
+              const todoId = val.value as Todo;
+
+              return currentTodos.filter(todo => todo.id !== todoId.id);
+            });
+          }
+        });
+      })
+      .finally(() => setLoadingId({}));
+  };
+
+  const handleDelete = (todoId: number): Promise<void> => {
+    return deleteTodo(todoId)
+      .then(() => {
+        setTodos(currentTodos =>
+          currentTodos.filter(todo => todo.id !== todoId),
+        );
+      })
+      .catch(() => {
+        setErrorMessage(ErrorMessage.UnableToDelete);
+      })
+      .finally(() => setTempTodo(null));
+  };
 
   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">
+        <Header
+          tempTodo={tempTodo}
+          todos={todos}
+          onToggleAll={handleToggleAll}
+          onChangeTempTodo={setTempTodo}
+          setErrorMessage={setErrorMessage}
+          onSubmit={handleAdd}
+        />
+
+        <TodoList
+          todos={filteredTodos(todos, filter)}
+          tempTodo={tempTodo}
+          loadingId={loadingId}
+          onEdit={updateCompleted}
+          onDelete={handleDelete}
+        />
+
+        {!!todos.length && (
+          <Footer
+            todos={todos}
+            selectedFilter={filter}
+            onFilteredStatus={setFilter}
+            onDeleteCompleted={handleDeleteCompleted}
+            setLoadingId={setLoadingId}
+          />
+        )}
+      </div>
+
+      <Errors
+        message={errorMessage}
+        clearError={() => setErrorMessage(ErrorMessage.Default)}
+      />
+    </div>
   );
 };
diff --git a/src/api/constants.ts b/src/api/constants.ts
new file mode 100644
index 0000000000..408473d637
--- /dev/null
+++ b/src/api/constants.ts
@@ -0,0 +1,2 @@
+export const USER_ID = 2132;
+export const TODOS_ENDPOINT = '/todos';
diff --git a/src/api/todos.ts b/src/api/todos.ts
new file mode 100644
index 0000000000..b03020c46c
--- /dev/null
+++ b/src/api/todos.ts
@@ -0,0 +1,19 @@
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+import { USER_ID, TODOS_ENDPOINT } from './constants';
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`${TODOS_ENDPOINT}?userId=${USER_ID}`);
+};
+
+export const addTodo = (data: Omit<Todo, 'id'>) => {
+  return client.post<Todo>(TODOS_ENDPOINT, data);
+};
+
+export const deleteTodo = (todoId: number) => {
+  return client.delete(`${TODOS_ENDPOINT}/${todoId}`);
+};
+
+export const updateTodo = ({ id, ...todo }: Todo) => {
+  return client.patch<Todo>(`${TODOS_ENDPOINT}/${id}`, todo);
+};
diff --git a/src/components/Errors.tsx b/src/components/Errors.tsx
new file mode 100644
index 0000000000..a7342f7f5b
--- /dev/null
+++ b/src/components/Errors.tsx
@@ -0,0 +1,39 @@
+import React, { useEffect } from 'react';
+import cn from 'classnames';
+
+type Props = {
+  message: string;
+  clearError: () => void;
+};
+
+export const Errors: React.FC<Props> = props => {
+  const { message, clearError } = props;
+
+  useEffect(() => {
+    const timeOut = setTimeout(clearError, 3000);
+
+    return () => {
+      clearTimeout(timeOut);
+    };
+  }, [message]);
+
+  return (
+    <div
+      data-cy="ErrorNotification"
+      className={cn(
+        'notification',
+        'is-danger',
+        'is-light has-text-weight-normal',
+        { hidden: !message },
+      )}
+    >
+      <button
+        data-cy="HideErrorButton"
+        type="button"
+        className="delete"
+        onClick={clearError}
+      />
+      {message}
+    </div>
+  );
+};
diff --git a/src/components/Footer.tsx b/src/components/Footer.tsx
new file mode 100644
index 0000000000..ed35f8f9ea
--- /dev/null
+++ b/src/components/Footer.tsx
@@ -0,0 +1,75 @@
+import React, { useMemo } from 'react';
+import cn from 'classnames';
+import { Filters } from '../types/enum/Filters';
+import { Todo } from '../types/Todo';
+import { Loading } from '../types/Loading';
+
+type Props = {
+  todos: Todo[];
+  selectedFilter: Filters;
+  onFilteredStatus: (filter: Filters) => void;
+  onDeleteCompleted: () => void;
+  setLoadingId: React.Dispatch<React.SetStateAction<Loading>>;
+};
+
+export const Footer: React.FC<Props> = props => {
+  const {
+    todos,
+    selectedFilter,
+    onFilteredStatus,
+    onDeleteCompleted,
+    setLoadingId,
+  } = props;
+  // const [isLoading, setIsLoading] = useState(false);
+
+  const filtersValue = useMemo(() => Object.values(Filters), []);
+  const activeTodosCount = useMemo(
+    () => todos.filter(todo => !todo.completed).length,
+    [todos],
+  );
+  const isCompleted = useMemo(
+    () => todos.some(todo => todo.completed),
+    [todos],
+  );
+  let isDeleteCompleted = false;
+
+  const handleDeleteCompleted = () => {
+    setLoadingId({});
+    isDeleteCompleted = true;
+    onDeleteCompleted();
+  };
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {activeTodosCount} items left
+      </span>
+      <nav className="filter" data-cy="Filter">
+        {filtersValue.map(filter => (
+          <a
+            key={filter}
+            href={`#/${filter !== Filters.All && filter.toLowerCase()}`}
+            className={cn('filter__link', {
+              selected: filter === selectedFilter,
+            })}
+            data-cy={`FilterLink${filter}`}
+            onClick={() => onFilteredStatus(filter)}
+          >
+            {filter}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        disabled={isDeleteCompleted || !isCompleted}
+        style={{ visibility: !isCompleted ? 'hidden' : 'visible' }}
+        onClick={handleDeleteCompleted}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};
diff --git a/src/components/Header.tsx b/src/components/Header.tsx
new file mode 100644
index 0000000000..29a84a640a
--- /dev/null
+++ b/src/components/Header.tsx
@@ -0,0 +1,95 @@
+import React, { useState, useEffect, useRef } from 'react';
+import cn from 'classnames';
+import { Todo } from '../types/Todo';
+import { ErrorMessage } from '../types/enum/Errors';
+import { USER_ID } from '../api/constants';
+
+type Props = {
+  todos: Todo[];
+  tempTodo: Todo | null;
+  onToggleAll: () => void;
+  onChangeTempTodo: (tempdo: Todo | null) => void;
+  setErrorMessage: (message: ErrorMessage) => void;
+  onSubmit: (todo: Todo) => Promise<Todo | void>;
+};
+
+export const Header: React.FC<Props> = props => {
+  const {
+    tempTodo,
+    todos,
+    onToggleAll,
+    onChangeTempTodo,
+    setErrorMessage,
+    onSubmit,
+  } = props;
+
+  const [value, setValue] = useState('');
+  const isAllCompleted = todos.every(todo => todo.completed);
+  const titleField = useRef<HTMLInputElement>(null);
+
+  useEffect(() => {
+    if (titleField.current && tempTodo === null) {
+      titleField.current.focus();
+    }
+  }, [tempTodo, todos.length]);
+
+  const addingTodo = (event: React.FormEvent<HTMLElement>) => {
+    event.preventDefault();
+
+    if (!value.trim()) {
+      setErrorMessage(ErrorMessage.EmptyTitle);
+
+      return;
+    }
+
+    const newTodo = {
+      id: 0,
+      userId: USER_ID,
+      title: value.trim(),
+      completed: false,
+    };
+
+    let todoCreatedSuccessfully = true;
+
+    onSubmit(newTodo)
+      .catch(() => {
+        setErrorMessage(ErrorMessage.UnableToAdd);
+        todoCreatedSuccessfully = false;
+      })
+      .finally(() => {
+        if (todoCreatedSuccessfully) {
+          setValue('');
+        }
+
+        onChangeTempTodo(null);
+      });
+  };
+
+  return (
+    <>
+      <header className="todoapp__header">
+        {!!todos.length && (
+          <button
+            type="button"
+            className={cn('todoapp__toggle-all', { active: isAllCompleted })}
+            data-cy="ToggleAllButton"
+            onClick={onToggleAll}
+          />
+        )}
+
+        <form onSubmit={addingTodo}>
+          <input
+            data-cy="NewTodoField"
+            type="text"
+            className="todoapp__new-todo"
+            placeholder="What needs to be done?"
+            value={value}
+            ref={titleField}
+            disabled={Boolean(tempTodo)}
+            onChange={event => setValue(event.target.value)}
+          />
+        </form>
+      </header>
+    </>
+  );
+};
diff --git a/src/components/TodoItem.tsx b/src/components/TodoItem.tsx
new file mode 100644
index 0000000000..21bbe71bc7
--- /dev/null
+++ b/src/components/TodoItem.tsx
@@ -0,0 +1,145 @@
+/* eslint-disable jsx-a11y/label-has-associated-control */
+/* eslint-disable jsx-a11y/control-has-associated-label */
+import React, { useState, useEffect, useRef } from 'react';
+import cn from 'classnames';
+import { Todo } from '../types/Todo';
+import { Loading } from '../types/Loading';
+
+enum TodoKey {
+  Title = 'title',
+  Completed = 'completed',
+}
+
+type Props = {
+  todo: Todo;
+  loadingId: Loading;
+  onEdit: (
+    todo: Todo,
+    key: keyof Todo,
+    value: boolean | string,
+  ) => Promise<boolean>;
+  onDelete: (todoID: number) => Promise<void>;
+};
+
+export const TodoItem: React.FC<Props> = props => {
+  const { todo, loadingId, onEdit, onDelete } = props;
+
+  const [isEditing, setIsEditing] = useState(false);
+  const [isLoading, setLoading] = useState(false);
+  const [newTitle, setNewTitle] = useState(todo.title);
+
+  const titleForm = useRef<HTMLInputElement>(null);
+  const isActive =
+    Object.hasOwn(loadingId, todo.id) || isLoading || todo.id === 0;
+
+  useEffect(() => {
+    if (titleForm.current && isEditing) {
+      titleForm.current.focus();
+    }
+  }, [isEditing]);
+
+  const handleDelete = () => {
+    setLoading(true);
+
+    onDelete(todo.id).finally(() => setLoading(false));
+  };
+
+  const handleEdit = () => {
+    setLoading(true);
+
+    onEdit(todo, TodoKey.Completed, !todo.completed).finally(() =>
+      setLoading(false),
+    );
+  };
+
+  const handleSubmitForm = () => {
+    if (newTitle === todo.title) {
+      setIsEditing(false);
+
+      return;
+    }
+
+    if (!newTitle.trim()) {
+      handleDelete();
+
+      return;
+    }
+
+    setLoading(true);
+    onEdit(todo, TodoKey.Title, newTitle.trim())
+      .then(res => setIsEditing(res))
+      .finally(() => setLoading(false));
+  };
+
+  const handleKeyUp = (event: React.KeyboardEvent) => {
+    if (event.key === 'Escape') {
+      setIsEditing(false);
+    }
+  };
+
+  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={handleEdit}
+        />
+      </label>
+
+      {isEditing ? (
+        <div onKeyUp={({ key }) => key === 'Escape' && setIsEditing(false)}>
+          <form
+            onSubmit={event => {
+              event.preventDefault();
+              handleSubmitForm();
+            }}
+          >
+            <input
+              data-cy="TodoTitleField"
+              type="text"
+              className="todo__title-field"
+              placeholder="Empty todo will be deleted"
+              ref={titleForm}
+              value={newTitle}
+              onChange={event => setNewTitle(event.target.value)}
+              onBlur={handleSubmitForm}
+              onKeyUp={handleKeyUp}
+            />
+          </form>
+        </div>
+      ) : (
+        <>
+          <span
+            data-cy="TodoTitle"
+            className="todo__title"
+            onDoubleClick={() => setIsEditing(true)}
+          >
+            {todo.title}
+          </span>
+
+          <button
+            type="button"
+            className="todo__remove"
+            data-cy="TodoDelete"
+            onClick={handleDelete}
+          >
+            ×
+          </button>
+        </>
+      )}
+
+      <div
+        data-cy="TodoLoader"
+        className={cn('modal overlay', {
+          'is-active': isActive,
+        })}
+      >
+        <div className="modal-background has-background-white-ter" />
+        <div className="loader" />
+      </div>
+    </div>
+  );
+};
diff --git a/src/components/TodoList.tsx b/src/components/TodoList.tsx
new file mode 100644
index 0000000000..81d6fef25c
--- /dev/null
+++ b/src/components/TodoList.tsx
@@ -0,0 +1,45 @@
+/* eslint-disable jsx-a11y/label-has-associated-control */
+/* eslint-disable jsx-a11y/control-has-associated-label */
+import React from 'react';
+import { TodoItem } from '../components/TodoItem';
+import { Todo } from '../types/Todo';
+import { Loading } from '../types/Loading';
+
+type Props = {
+  todos: Todo[];
+  tempTodo: Todo | null;
+  loadingId: Loading;
+  onEdit: (
+    todo: Todo,
+    key: keyof Todo,
+    value: boolean | string,
+  ) => Promise<boolean>;
+  onDelete: (todoID: number) => Promise<void>;
+};
+
+export const TodoList: React.FC<Props> = props => {
+  const { todos, tempTodo, loadingId, onEdit, onDelete } = props;
+
+  return (
+    <section className="todoapp__main" data-cy="TodoList">
+      {todos.map(todo => (
+        <TodoItem
+          todo={todo}
+          key={todo.id}
+          loadingId={loadingId}
+          onEdit={onEdit}
+          onDelete={onDelete}
+        />
+      ))}
+
+      {tempTodo && (
+        <TodoItem
+          todo={tempTodo}
+          loadingId={loadingId}
+          onEdit={onEdit}
+          onDelete={onDelete}
+        />
+      )}
+    </section>
+  );
+};
diff --git a/src/types/Loading.ts b/src/types/Loading.ts
new file mode 100644
index 0000000000..1d568954d5
--- /dev/null
+++ b/src/types/Loading.ts
@@ -0,0 +1,3 @@
+export interface Loading {
+  [key: number]: number;
+}
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/types/enum/Errors.ts b/src/types/enum/Errors.ts
new file mode 100644
index 0000000000..db21566cf7
--- /dev/null
+++ b/src/types/enum/Errors.ts
@@ -0,0 +1,8 @@
+export enum ErrorMessage {
+  Default = '',
+  UnableToLoad = 'Unable to load todos',
+  EmptyTitle = 'Title should not be empty',
+  UnableToAdd = 'Unable to add a todo',
+  UnableToDelete = 'Unable to delete a todo',
+  UnableToUpdate = 'Unable to update a todo',
+}
diff --git a/src/types/enum/Filters.ts b/src/types/enum/Filters.ts
new file mode 100644
index 0000000000..6c26945612
--- /dev/null
+++ b/src/types/enum/Filters.ts
@@ -0,0 +1,5 @@
+export enum Filters {
+  All = 'All',
+  Active = 'Active',
+  Completed = 'Completed',
+}
diff --git a/src/types/enum/Status.ts b/src/types/enum/Status.ts
new file mode 100644
index 0000000000..30ad355656
--- /dev/null
+++ b/src/types/enum/Status.ts
@@ -0,0 +1,5 @@
+export enum Status {
+  Active = 'Active',
+  Completed = 'Completed',
+  All = 'All',
+}
diff --git a/src/utils/fetchClient.ts b/src/utils/fetchClient.ts
new file mode 100644
index 0000000000..5be775084e
--- /dev/null
+++ b/src/utils/fetchClient.ts
@@ -0,0 +1,42 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+const BASE_URL = 'https://mate.academy/students-api';
+
+function wait(delay: number) {
+  return new Promise(resolve => {
+    setTimeout(resolve, delay);
+  });
+}
+
+type RequestMethod = 'GET' | 'POST' | 'PATCH' | 'DELETE';
+
+function request<T>(
+  url: string,
+  method: RequestMethod = 'GET',
+  data: any = null,
+): Promise<T> {
+  const options: RequestInit = { method };
+
+  if (data) {
+    options.body = JSON.stringify(data);
+    options.headers = {
+      'Content-Type': 'application/json; charset=UTF-8',
+    };
+  }
+
+  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/filteredClent.ts b/src/utils/filteredClent.ts
new file mode 100644
index 0000000000..0c30f35afd
--- /dev/null
+++ b/src/utils/filteredClent.ts
@@ -0,0 +1,18 @@
+import { Filters } from '../types/enum/Filters';
+import { Todo } from '../types/Todo';
+
+export const filteredTodos = (todos: Todo[], filter: Filters) => {
+  const filterTodos = [...todos];
+
+  switch (filter) {
+    case Filters.Active:
+      return filterTodos.filter(todo => !todo.completed);
+
+    case Filters.Completed:
+      return filterTodos.filter(todo => todo.completed);
+
+    case Filters.All:
+    default:
+      return filterTodos;
+  }
+};
diff --git a/src/utils/filteredTodos.ts b/src/utils/filteredTodos.ts
new file mode 100644
index 0000000000..0c30f35afd
--- /dev/null
+++ b/src/utils/filteredTodos.ts
@@ -0,0 +1,18 @@
+import { Filters } from '../types/enum/Filters';
+import { Todo } from '../types/Todo';
+
+export const filteredTodos = (todos: Todo[], filter: Filters) => {
+  const filterTodos = [...todos];
+
+  switch (filter) {
+    case Filters.Active:
+      return filterTodos.filter(todo => !todo.completed);
+
+    case Filters.Completed:
+      return filterTodos.filter(todo => todo.completed);
+
+    case Filters.All:
+    default:
+      return filterTodos;
+  }
+};
diff --git a/src/utils/loadingObject.ts b/src/utils/loadingObject.ts
new file mode 100644
index 0000000000..d9ec8c9a5b
--- /dev/null
+++ b/src/utils/loadingObject.ts
@@ -0,0 +1,11 @@
+import { Loading } from '../types/Loading';
+import { Todo } from '../types/Todo';
+
+export const loadingObject = (todos: Todo[]): Loading => {
+  return todos.reduce((acc: Loading, todo: Todo): Loading => {
+    return {
+      ...acc,
+      [todo.id]: todo.id,
+    };
+  }, {} as Loading);
+};