Expo

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Introduction

Expo is an open-source platform for making universal native apps that run on Android, iOS, and the web. It includes a universal runtime and libraries that let you build native apps by writing React and JavaScript.

This repository includes the Expo SDK, Modules API, Go app, CLI, Router, documentation, and various other supporting tools. Expo Application Services (EAS) is a platform of hosted services that are deeply integrated with Expo open source tools. EAS helps you build, ship, and iterate on your app as an individual or a team.

Read the Expo Community Guidelines before interacting in the repository. Thank you for helping keep the Expo community open and welcoming!

Table of contents

• 📚 Documentation
• 🗺 Project Layout
• 🏅 Badges
• 👏 Contributing
• ❓ FAQ
• 💙 The Team
• License

📚 Documentation

Learn about building and deploying universal apps in our official docs!

• Getting Started
• API Reference
• Using Custom Native Modules

🗺 Project Layout

• <code class="ra0-md-code">packages</code> All the source code for Expo modules, if you want to edit a library or just see how it works this is where you'll find it.
• <code class="ra0-md-code">apps</code> This is where you can find Expo projects which are linked to the development modules. You'll do most of your testing in here.
• <code class="ra0-md-code">apps/expo-go</code> This is where you can find the source code for Expo Go.
• <code class="ra0-md-code">apps/expo-go/ios/Exponent.xcworkspace</code> is the Xcode workspace. When developing iOS, always open this instead of Exponent.xcodeproj because the workspace also loads the CocoaPods dependencies.
• <code class="ra0-md-code">docs</code> The source code for https://docs.expo.dev
• <code class="ra0-md-code">templates</code> The template projects you get when you run npx create-expo-app
• <code class="ra0-md-code">react-native-lab</code> This is our fork of react-native used to build Expo Go.
• <code class="ra0-md-code">guides</code> In-depth tutorials for advanced topics like contributing to the client.
• <code class="ra0-md-code">tools</code> contain build and configuration tools.
• <code class="ra0-md-code">template-files</code> contains templates for files that require private keys. They are populated using the keys in template-files/keys.json.
• <code class="ra0-md-code">template-files/ios/dependencies.json</code> specifies the CocoaPods dependencies of the app.

🏅 Badges

Let everyone know your app can be run instantly in the _Expo Go_ app!



[![runs with Expo Go](https://img.shields.io/badge/Runs%20with%20Expo%20Go-000.svg?style=flat-square&logo=EXPO&labelColor=f3f3f3&logoColor=000)](https://expo.dev/client)

[![runs with Expo Go](https://img.shields.io/badge/Runs%20with%20Expo%20Go-4630EB.svg?style=flat-square&logo=EXPO&labelColor=f3f3f3&logoColor=000)](https://expo.dev/client)

👏 Contributing

If you like Expo and want to help make it better then check out our contributing guide! Check out the CLI package to work on the Expo CLI.

❓ FAQ

If you have questions about Expo and want answers, then check out our Frequently Asked Questions!

If you still have questions you can ask them on our Discord and Forums or X @expo.

💙 The Team

Curious about who makes Expo? Here are our team members!

License

The Expo source code is made available under the MIT license. Some of the dependencies are licensed differently, with the BSD license, for example.