> ## 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 AppsFlyer

> Choose the iOS or Android guide to register your app in AppsFlyer.

Register each mobile version of your Rey app in AppsFlyer. Use the guide for every platform you plan to measure.

<CardGroup cols={2}>
  <Card title="Register an iOS app" icon="smartphone" href="/integrations/appsflyer/register-ios">
    Add your iOS app in AppsFlyer and locate its AppsFlyer App ID.
  </Card>

  <Card title="Register an Android app" icon="smartphone" href="/integrations/appsflyer/register-android">
    Add your Android app in AppsFlyer using its package name.
  </Card>
</CardGroup>

<Tip>
  AppsFlyer uses a single Dev Key for your account, while your iOS and Android apps are registered separately.
</Tip>