> ## 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.

# Configure your OneSignal app

> Choose the iOS or Android guide to configure push delivery for your OneSignal app.

Configure every mobile platform that your Rey app supports so OneSignal can deliver push notifications.

<CardGroup cols={2}>
  <Card title="Configure iOS push" icon="smartphone" href="/integrations/onesignal/configure-ios">
    Create an APNs `.p8` key and connect it to OneSignal.
  </Card>

  <Card title="Configure Android push" icon="smartphone" href="/integrations/onesignal/configure-android">
    Create a Firebase Cloud Messaging service-account key and connect it to OneSignal.
  </Card>
</CardGroup>

<Warning>
  Push notifications will not deliver until the relevant iOS or Android credentials are configured in OneSignal.
</Warning>