To see an example application that has the Privy Expo SDK configured with passkeys, check out our Expo starter repo!

​
0. Ensure you have configured a custom build configuration

If you have not already configured a custom build configuration, follow the custom build configuration guide.

​
1. Install additional peer dependencies

npx expo install react-native-passkeys

​
2. Update native app settings

Passkeys require that you associate a website with your app. To do so, you need to have the associated domain file on your website and the appropriate entitlement in your app.

​
1. Apple App Site Association

  • Create a JSON file with at least the following content
{
  "webcredentials": {
    "apps": ["<teamID>.<bundleID>"]
  }
}
  • Make the file accessible on your website at the following path
https://<your_domain>/.well-known/apple-app-site-association
Make sure to use your teamID and bundleID in the file hosted on your website.For more information about supporting associated domains see Apple’s documentation.

​
2. App configuration

Next, update your app.json (or app.config.ts) to include the associatedDomains and deploymentTarget like so:
{
  "expo": {
    "ios": {
      "associatedDomains": ["webcredentials:<your_domain>"]
    }
    "plugins": [
      [
        "expo-build-properties",
        {
          "ios": {
            "deploymentTarget": "17.5"
          }
        }
      ]
    ]
  }
}

​
3. Build

Lastly, build your app!
npx expo prebuild -p ios
npx expo run:ios