Google's Flutter UI framework brings bug fixes and support for new features in Android 11 and iOS 14.

This is where Google's Flutter UI framework kicks in. Find out how to build a cross platform 'Hello World' app, using Flutter and Dart.

In addition to mobile apps, developers will be able to use Flutter to build apps for the web, desktop and embedded devices -- all from a single code base.

Google has released version 1.2 of Flutter, its open source Android and iOS mobile app SDK, at Mobile World Congress in Barcelona, Spain.