Flutter is an open-source UI software development kit created by Google to build natively compiled applications for mobile, web, and desktop from a single codebase. It uses the Dart programming language and provides a rich set of pre-designed widgets, a reactive framework, and direct access to native features through platform channels. Unlike traditional hybrid approaches, Flutter compiles to native code and renders its own high-performance graphical layer, which enables highly customizable and consistent user interfaces across platforms while maintaining strong performance characteristics.
