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Register the Android version of your app in the RevenueCat project you created.
1

Open Apps in RevenueCat

In your RevenueCat project, open Apps and choose Add app.
2

Choose Android

Select Android as the platform.
3

Enter the package name

Enter the exact Android package name (application ID) used in Google Play Console.
4

Connect your Google service-account key

In the Android app settings in RevenueCat, add the Google service-account JSON key for the Google Play account that owns your app. RevenueCat uses this credential to work with your Google Play products and subscriptions.If you do not have a key yet, create a Google Cloud service account, enable the Google Play Android Developer API, grant the account access in Google Play Console, and download its JSON key. See Google Service Account Key for the complete setup.
5

Save the app

Finish adding the app. RevenueCat creates a Google public SDK key for it, which you will copy when connecting RevenueCat to Rey.
The Google service-account JSON key is sensitive. Keep it private and only provide it to trusted services such as RevenueCat.
Configure Google Play products with the same product IDs that you later add to RevenueCat.