GitHubPopular is a cross-platform mobile application designed to discover and track the most popular and trending projects on GitHub. Built with React Native, it runs seamlessly on both Android and iOS devices. The app offers extensive customization and discovery features, including support for subscribing to over 50 programming languages with the ability to add, remove, and reorder them based on personal preference. Users can search for specific projects using custom keywords, bookmark favorite repositories for quick access, and share interesting finds directly with friends. The interface supports multiple color themes to suit individual tastes, providing a tailored viewing experience. Beyond its utility for developers, the project serves as an educational example of React Native development combined with Redux for state management, demonstrating best practices in modern mobile architecture. The application is fully open source, encouraging community contributions and pull requests to further enhance its fun