Flutter is Google’s mobile 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. In our Google IO Extended Flutter codelab, you’ll create a simple Flutter app. If you are familiar with object-oriented code and basic programming concepts such as variables, loops, and conditionals, you can complete this codelab. You don’t need previous experience with Dart or mobile programming.