# Expo
URL: https://wwadd.dev/tools/expo · Official site: https://expo.dev
Kind: React Native framework and cloud services · License: Open source · Last verified: 2026-09-28

The framework layer on top of React Native: an SDK of device APIs, file-based routing with Expo Router, and EAS cloud services that build, submit, and update apps without local Xcode or Android Studio setup.

Reach for it when:
- Starting a React Native app
- Cloud builds and over-the-air JavaScript updates

Worth knowing: The SDK is open source; EAS build and update services have a free tier and paid plans.

Repository: https://github.com/expo/expo
Recorded SPDX baseline: MIT