> ## Documentation Index
> Fetch the complete documentation index at: https://docs.reyapp.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Register your app with RevenueCat

> Choose the iOS, Android, or web guide to register your app in RevenueCat.

Register every version of your Rey app that will offer purchases in the RevenueCat project you created. Choose the guide for each platform you support.

<CardGroup cols={3}>
  <Card title="Register an iOS app" icon="smartphone" href="/integrations/revenuecat/register-ios">
    Add your Apple Bundle ID and get the iOS public SDK key.
  </Card>

  <Card title="Register an Android app" icon="smartphone" href="/integrations/revenuecat/register-android">
    Add your Android package name and get the Android public SDK key.
  </Card>

  <Card title="Register a web app" icon="globe" href="/integrations/revenuecat/register-web">
    Add your web app and get the Web public SDK key.
  </Card>
</CardGroup>

<Tip>
  Use the exact Bundle ID or package name already assigned to your app. After you register a platform, return to Rey to add its matching public SDK key.
</Tip>