Question 1

What are Google Play real-time developer notifications (RTDN)?

Accepted Answer

RTDNs are Pub/Sub messages that Google Play sends to your backend when a subscription event occurs — renewal, cancellation, expiry, grace period entry, account hold, etc. Without a service like Tierux, you must set up a Google Cloud Pub/Sub topic and subscription, handle authentication, and parse the notification payloads yourself.

Question 2

How does Tierux handle RTDNs?

Accepted Answer

Tierux's MCP agent configures the Pub/Sub topic and subscription during Google Play setup. Incoming notifications are automatically validated (JWT signature + audience check), parsed, and applied to the user's entitlement state — your backend queries the REST API and always sees current data, not a stale snapshot.

Question 3

Does Tierux process Apple App Store notifications too?

Accepted Answer

Yes. Tierux handles App Store Server Notifications v2 (JWS-signed) for subscription lifecycle events — renewal, expiry, billing retry, refund, etc. — and updates entitlement state the same way it does for Google Play RTDNs.

Capability	With Tierux	Without Tierux
Pub/Sub setup	MCP agent automates topic + subscription creation	Manual Google Cloud Console setup, IAM roles
Notification validation	JWT signature + audience checked automatically	Custom JWT verification, key rotation handling
Renewal processing	Auto-updates entitlement expiry	Custom state machine per subscription
Cancellation handling	Grace period tracked, expiry date set	Manual parsing + DB updates
Apple Server Notifications v2	JWS-signed notification processing included	Separate implementation, certificate management
Entitlement state sync	Always current via REST API	Batch jobs or stale snapshots

RTDN webhooks

Purchase verification

Server-side entitlements

Docs: RTDN setup

Let RTDNs update your entitlements automatically