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# Flutter ![Flutter logo][]

 

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# Build beautiful native apps in record time

 

Flutter is Google's mobile app SDK for crafting high-quality native interfaces on iOS and Android in record time. Flutter works with existing code, is used by developers and organizations around the world, and is free and open source.

 

### Documentation

 

**Main site: [flutter.io][]**

* [Install](https://flutter.io/get-started/install/)

* [Get started](https://flutter.io/get-started/)

* [API documentation](https://docs.flutter.io/)

* [Changelog](https://github.com/flutter/flutter/wiki/Changelog)

* [How to contribute](https://github.com/flutter/flutter/blob/master/CONTRIBUTING.md)

 

For announcements about new releases and breaking changes, follow the

[flutter-announce@googlegroups.com](https://groups.google.com/forum/#!forum/flutter-announce)

mailing list.

 

## Fast development

 

Flutter's <em>hot reload</em> helps you quickly

and easily experiment, build UIs, add features, and fix

bugs. Experience sub-second reload times,

without losing state, on

emulators, simulators, and hardware for iOS

and Android.

 

<img src="https://raw.githubusercontent.com/flutter/website/master/src/_assets/image/tools/android-studio/hot-reload.gif" alt="Make a change in your code, and your app changes instantly.">