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Expo Application Services
API Reference

Getting started

Setting up EAS Update allows you to push critical bug fixes and improvements that your users need right away.

Prerequisites

EAS Update requires the following versions or greater:
  • EAS CLI >= 0.50.0
  • Expo SDK >= 45.0.0
  • expo-updates >= 0.13.0

1

Install the latest EAS CLI

EAS CLI is the command-line app that you will use to interact with EAS services from your terminal. To install it, run the command:
Terminal
→ npm install --global eas-cli
You can also use the above command to check if a new version of EAS CLI is available. We encourage you to always stay up to date with the latest version.
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We recommend using npm instead of yarn for global package installations. You may alternatively use npx eas-cli, just remember to use that instead of eas whenever it's called for in the documentation.

2

Create a project

Create a project by running:
Terminal
→ npx create-expo-app

3

Configure your project

To configure your project, run the following commands in the order they are specified:
Terminal
# Install the latest `expo-updates` library
→ npx expo install expo-updates

# Initialize your project with EAS Update
→ eas update:configure

# Set up the configuration file for builds
→ eas build:configure
After running these commands, eas.json file will be created in the root directory of your project.
Inside the preview and production build profiles in eas.json, add a channel property for each:
eas.json
{
  "build": {
    "preview": {
      "channel": "preview"
      // ...
    },
    "production": {
      "channel": "production"
      // ...
    }
  }
}
The channel allows you to point updates at builds. For example, if we set up a GitHub Action to publish changes on merge, it will make it so that we can merge code into the "production" Git branch. Then, each commit will trigger a GitHub Action that will publish an update that will be available to builds with the channel "production".
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Optional: If your project is a bare React Native project, see Updating bare app for any additional configuration.

4

Create a build for the project

Next, we'll need to create a build for Android or iOS. Learn more.
We recommend creating a build with the preview build profile first. Learn more about setting up your devices for internal distribution.
Once you have a build running on your device or in a simulator, we'll be ready to send it an update.

5

Make changes locally

Once we've created a build, we're ready to iterate on our project. Start a local development server with:
Terminal
→ npx expo start
Then, make any desired changes to your project's JavaScript, styling, or image assets.

6

Publish an update

Now we're ready to publish an update to the build created in the previous step.
Then publish an update with the following command:
Terminal
→ eas update --branch [branch] --message [message]

# Example
→ eas update --branch preview --message "Updating the app"
Once the update is built and uploaded to EAS and the command completes, force close and reopen your app up to two times to download and view the update.

Next steps

You can publish updates continuously with GitHub Actions. Learn more: Using GitHub Actions with EAS Update
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