Flutter is a powerful cross-platform app development framework developed by Google that has gained significant popularity in recent years due to its flexibility and compatibility with various platforms including iOS, Android, Windows, MacOS, Linux, and the web. It offers near-native performance, developer-friendly tooling, and an easy-to-learn syntax making it accessible for developers of all backgrounds. Flutter's programming language, Dart, is also designed to be familiar and offers several features that contribute to a smooth development experience. With its large widget library, memory safety and concurrency features, and support from notable organizations such as Google, Toyota, and Ubuntu, Flutter has surpassed React Native in terms of market share and popularity.