Retool Mobile, recently released in public beta, aims to simplify building and deploying internal mobile apps for iOS and Android, utilizing a cross-platform React Native app to render and update applications. The development team faced performance challenges due to the cross-platform architecture, initially using third-party component libraries, unnecessary re-rendering with Redux, and code-splitting inherited from their React codebase. To optimize performance, they replaced heavy third-party libraries with custom lightweight ones, minimized unnecessary re-rendering by refining state management, and removed code-splitting, leading to a 67% performance improvement. These efforts highlight the balance between rapid prototyping and production optimization, with further enhancements planned as they explore new architectures like React Native's Fabric.