Testing RevenueCat on Android

Use this skill to stand up a fast test loop for a RevenueCat Android integration. The Test Store replaces the Google Play sandbox for most work, a BillingService interface makes Purchases mockable, and a small GitHub Actions job runs unit tests on every push.

Full source: see the full chapter on revenuecat.com.

Phase 1: Discovery

Before changing anything, learn what already exists. Answer each question with a file or a "no".