Flutter and React Native are two popular cross-development platforms used to create applications for Android, Windows, and iOS users. Flutter is a Google initiative launched in 2018, which offers fast development, seamless UI changes, and unlimited customization opportunities. However, its platform uses a framework and programming language that is not fully developed, making it difficult to support features and create standard guidelines. On the other hand, React Native uses JavaScript and React as its main assets, providing simple user interfaces, community support, and flexibility. Despite its rise in popularity, React Native faces security issues due to its open-source framework. Flutter's performance is smooth and fast, thanks to its use of Dart language and C++, while React Native requires additional interactions to enhance performance. The choice between Flutter and React Native depends on the company's architecture, support, and interoperability between applications.