Monitoring performance in React Native applications is vital for providing a smooth user experience, as slow rendering, frame rate issues, network request errors, and unresponsive user interfaces can significantly impact app usage. Sentry's SDK enables automatic crash reporting and performance monitoring, capturing these issues during the application's runtime. Integrating Sentry into a React Native app allows developers to monitor performance issues in their codebase, track events, and identify areas for improvement. By enabling routing instrumentation, Sentry creates transactions on every route change, providing detailed information about slow frames, frozen frames, and app start times. This enables developers to optimize their application's performance by addressing slow data fetching, image caching, and other bottlenecks. With Sentry's insights, developers can iteratively improve the user experience, engage with users more effectively, and ultimately drive business success.