Flutter is an open-source UI software development kit created by Google that allows developers to build cross-platform applications from a single codebase for any web browser, Fuchsia, Android, iOS, Linux, macOS, and Windows). Flutter was first described in 2015 and was released in May 2017). Flutter apps are written in the Dart language and make use of many of the languages more advanced features). Some key features of Flutter include:

• Fast performance: Flutter code compiles to ARM or Intel machine code as well as JavaScript, which ensures a fast and effective performance.

• Consistent rendering: Flutter uses Google’s open-source Skia graphic library to render UI, which provides users with consistent visuals no matter what platform they use to access an application.

• Widgets: Flutter renders widgets using its own graphic engine instead of relying on a platform’s built-in widgets. This way, users will experience a similar look and feel in a Flutter application across platforms.

• Reactive user interfaces: Flutter is a reactive, declarative UI framework, in which the developer provides a mapping from application state to interface state, and the framework takes on the task of updating the interface.

Flutter is supported and used by Google, trusted by well-known brands around the world, and maintained by a community of global developers. Flutter is often used with DART, which is an object-oriented programming language by Google. Flutter is a powerful technology that can be used in both iOS and Android applications.