Expo
Expo is an open-source platform for building universal native apps for Android, iOS, and web using React Native. It provides a set of tools and services that simplify the development process by handling native code compilation, deployment, and over-the-air updates. Developers can write JavaScript/TypeScript code and access native device features through Expo's managed workflow or customize with the bare workflow.
Developers should use Expo when building cross-platform mobile apps with React Native, especially for rapid prototyping, MVP development, or projects where managing native code complexity is a concern. It's ideal for teams that want to focus on app logic rather than platform-specific configurations, and for scenarios requiring easy testing via Expo Go, over-the-air updates, or integration with services like push notifications and analytics.