How I Test In-App Subscriptions Before Releasing an App

Subscriptions are one of those features that are difficult to trust until you have tested the entire lifecycle on a real device.

A paywall appearing correctly is not enough. I want to know what happens after a purchase, whether premium access appears, whether it survives an app restart, whether a previous purchase can be restored and what happens when the subscription state changes.

Fortunately, I do not need to charge myself real money every time I test this.

Apple provides sandbox environments for in-app purchases, and services such as RevenueCat can show what entitlement state the app is currently receiving. That makes it possible to test most of the real flow before the application is publicly available.

The useful part for me is testing the system as a sequence rather than testing only the purchase button:

open paywall → purchase → receive entitlement → unlock feature → restart app → verify access → restore purchase

I also try to keep development accounts separate from whatever will eventually become real production usage. Subscription testing creates strange states very quickly, especially because sandbox subscriptions can renew and expire much faster than normal subscriptions.

The biggest lesson is that testing payments is really testing state, not payment screens.

If premium access is based on an entitlement, I want to see that entitlement behave correctly under different conditions. The UI should simply reflect that state.

Once I started thinking this way, subscription testing became much less mysterious.