Clubhouse.io is a project management platform that uses Sentry, a mobile performance monitoring tool, to monitor errors on its mobile app. The company's mobile engineer, Eli Perkins, used Sentry's React Native integration to track and resolve issues with the app's data fetching and rendering processes. With Sentry's help, Perkins was able to pinpoint and fix an issue where the app would crash when switching between organizations. He also implemented a new loading mechanism that fetches all necessary data before rendering a story, ensuring that the app wouldn't crash due to incomplete data. The company uses Objective-C as part of its mobile app development stack, and Sentry's integration with this language allowed Perkins to see both JavaScript and Objective C stack traces merged together.