React Native is a popular framework for building cross-platform mobile apps using a single codebase. While many developers are familiar with its core features, there are several hidden functionalities that can enhance performance and user experience. Features like Fast Refresh, Hermes for faster JavaScript execution, and Reanimated 2 for advanced animations offer significant improvements in app efficiency. Tools like Turbo Modules and Code Push streamline native performance and app updates. By leveraging these lesser-known features, developers can optimize their app development process, creating more responsive and scalable applications with enhanced user experiences across devices.