Expo

Expo is an open-source platform and toolchain built around React Native that lets developers write modern JavaScript or TypeScript to produce fully native iOS, Android and web apps without configuring Xcode or Android Studio. It provides a comprehensive SDK of prebuilt, cross-platform APIs (camera, sensors, notifications, maps, file system, etc.), a command-line interface for project scaffolding and local testing, and cloud services for building binaries, over-the-air updates, push-notification delivery and app store publishing. By abstracting away much of the native configuration—while still allowing “ejecting” to integrate custom native modules—Expo accelerates development, simplifies maintenance and lowers the barrier to entry for mobile-first teams.