# Expo

Tool · [Standard tools and platforms](https://ecosystem.samcarlton.com/tools)

Also called: Expo Go, Expo app, expo.dev

A set of tools and services for building, [testing](https://ecosystem.samcarlton.com/testing) and publishing [React Native](https://ecosystem.samcarlton.com/react-native) apps, including [cloud](https://ecosystem.samcarlton.com/terms/cloud) builds and [app store](https://ecosystem.samcarlton.com/web-app-mobile-app) submission.

**For example:** A [developer](https://ecosystem.samcarlton.com/software-engineer) tests the new app on her phone with Expo Go, then uses Expo's build service to send it to the [App Store](https://ecosystem.samcarlton.com/web-app-mobile-app).

Official site: <https://expo.dev>

## Connects to (4)

- [Tech stack](https://ecosystem.samcarlton.com/tech-stack): The set of programming languages and tools a product is built with.
- [Web app vs mobile app](https://ecosystem.samcarlton.com/web-app-mobile-app): A web app runs in a browser at a web address, on any device.
- [React Native](https://ecosystem.samcarlton.com/react-native): A framework from Meta for building iPhone and Android apps with React and JavaScript, sharing most of the code between the two.
- [Deployment](https://ecosystem.samcarlton.com/deployment): Putting the latest version of your app onto the live servers where real users can reach it.

Map view: https://ecosystem.samcarlton.com/expo