The Sentry Performance monitoring tool is now available on React Native, allowing developers to monitor and optimize the performance of their mobile applications. With its integration with Sentry's SDK, developers can easily instrument their code to track transactions, spans, and other performance metrics, enabling them to identify slow operations and improve overall app performance. The Sentry team has provided examples and recipes for using Performance on React Native, including how to set up basic monitoring, instrument Promises, create a transaction hub, and monitor real-time data flows. By leveraging these tools and techniques, developers can gain valuable insights into their app's performance and make data-driven decisions to improve user experience.