Google Is Testing 'Play Pass' App and Game Subscription on Android

The service offers a selection of premium apps and games with no ads or in-app purchases for one monthly fee, but it's unclear when or if Google will actually launch the service. 

How to unblock Google Play Store and Change Region

How To Get A Free Trial Subscription For Google Play Pass

Integrate the Google Play Billing Library into your app, Google Play's billing system

Google 'Play Pass' is a $5 monthly Android app subscription

How to Use Google Play Pass

Mobile Sports Time

Google Is Testing 'Play Pass' App and Game Subscription on Android

About subscriptions, Google Play's billing system

In-App Purchases with Flutter: A Comprehensive Step-by-Step tutorial, by M4trix Dev, Flutter Community