Flutter is an open-source UI software development kit created by Google that allows developers to create high-performance, high-fidelity apps for iOS and Android, as well as web, desktop, and cross-platform apps that run on any device with a screen). Flutter is designed to provide a canvas for high-end user experiences and to support mobile apps that run on both Android and iOS, as well as interactive apps that you want to run on your web pages or on the desktop. Some of the key features of Flutter include:

• Fast performance: Flutter code compiles to ARM or Intel machine code as well as JavaScript, for fast performance on any device. Flutter uses the programming language Dart and compiles into machine code, which ensures a fast and effective performance.

• Customizable rendering: Instead of relying on platform-specific rendering tools, Flutter uses Google’s open-source Skia graphic library to render UI. This 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. This approach also provides flexibility to developers, because some Flutter widgets can carry out functions that platform-specific widgets cannot).

• Hot Reload: Flutter allows developers to build and iterate quickly with Hot Reload. They can update code and see changes almost instantly, without losing state.

• Cross-platform development: Flutter allows developers to deploy to multiple devices from a single codebase: mobile, web, desktop, and embedded devices.

Flutter is used by developers inside and outside of Google to build beautiful natively-compiled apps for iOS and Android. It is also trusted by well-known brands around the world and maintained by a community of global developers. Flutter is particularly well-suited for apps that need to deliver highly branded designs and for designers who want to turn concepts into production code without the compromises imposed by typical frameworks.