Flutter

Flutter is Google's UI toolkit: build, test, and deploy natively compiled applications for mobile, web, and desktop from one codebase.

Flutter is Google’s open-source UI software development kit (SDK), designed for crafting beautiful, high-performance applications across six platforms (iOS, Android, web, Windows, macOS, and Linux) from a single codebase. It uses the Dart programming language and leverages a reactive, widget-based architecture for its UI. The key productivity feature is Hot Reload, which allows developers to see code changes reflected in the running app in milliseconds, without losing application state. This efficiency, combined with its native compilation to ARM or Intel machine code, ensures fast performance and a consistent, pixel-perfect user experience on every screen.

https://flutter.dev