Easily build apps with React Native
Our tools enable developers to build and share truly native apps that work across both iOS and Android. Everything is open source, free and uses React Native.
Try projects on Expo
Download the Expo mobile app to preview projects. You can also use the app to test your code live.
Start your next project
Use the CLI
Love the command line interface? Exp is our terminal program that lets you start building Expo projects with a few commands.
npm install exp --global
exp init your-project-name
cd your-project-name
exp startPlay with React Native
With Expo Snack you can try your ideas online, then publish and share them with anyone, anytime.
Try Expo Snack
Create your first SnackTest mobile code on the web
Write your code in the browser. For every time you hit Save, a new link is created so you can share your project with others.
Drag and drop components
New to React? Drag our pre-written components into the web editor and learn how they work without writing a line of code.
Embed your code
Made something you’re proud of? Embed it in a website to show it off or use it in documentation to demonstrate how it works.
What our users are saying
“WHAT??? I can't believe what I just did with @expo_io and React Native. I'm sooooo impressed 😮😮😮”
Developer @PYLadies
“In complete awe of the incredible tools @expo_io as built. If you're working in React Native, use these tools. 👏”
Senior Developer @ProctorU
“React Native and @expo_io is stealing my heart. Hot damn, cross platform dev is easy. Also, I love JS.”
Senior Engineer @hugeinc
“Officially 1h into messing around with @expo_io and there is no one left that is not annoyed by me explaining how awesome it is. Snack is 💯”
Senior Developer @NFIB
“Seriously, here are the steps:
1. Download the @expo_io app
2. Open a repl.it (like this https://repl.it/H0Qp/899 )
3. Scan the QR code
DONE!”
“https://expo.io brings mobile app development to everyone without entry fee or startup cost. Open a web browser, start coding and access to all APIs”
Engineering Manager @Facebook
“Expo is the best piece of new technology out right now. EXPO IS THE BEST PIECE OF NEW TECHNOLOGY OUT RIGHT NOW.”
Director of Open Source @FormidableLabs
“My goto #reactnative dev toolkit is @expo_io. Makes building/testing/deploying so much easier and fun! #recommend #js #React”
VP of Data Engineering @BlackRock
“Well this blew my mind: https://snack.expo.io/”
VP of Engineering @SlackHQ
Need help?
The best way to get help with your Expo project and React Native is to join the community forums or Slack.