# Chat21 Documentation

## Chat21 Documentation

- [Overview](https://docs.chat21.org/master.md)
- [Get Started for iOS](https://docs.chat21.org/ios/get-started.md): Create a fully functional chat as a Single View Application
- [Authentication](https://docs.chat21.org/ios/authentication.md)
- [User Interface](https://docs.chat21.org/ios/user-interface.md)
- [Get Started for Android](https://docs.chat21.org/android/get-started-for-android.md): Your first Android App with Chat21 SDK