Expo

Expo is a comprehensive development platform that eliminates the complexity of building cross-platform applications. Instead of maintaining separate codebases for iOS, Android, and web, developers write once in React and deploy everywhere with native performance and capabilities.

The framework provides pre-built native modules for camera, location, notifications, and dozens of other device features—no native code required. This means JavaScript developers can build full-featured mobile apps without learning Swift, Kotlin, or Objective-C. When you need custom functionality, Expo's architecture still allows direct access to native APIs.

What sets Expo apart is its integrated toolchain that handles the painful parts of mobile development: over-the-air updates, build services, push notifications, and app distribution. You can test on physical devices instantly using the Expo Go app, and the development experience includes fast refresh, comprehensive documentation, and a supportive community.

Whether you're a web developer entering mobile development or a team seeking faster iteration cycles, Expo reduces time-to-market while maintaining the quality and performance users expect from native applications.