Sell digital content in your apps, whether in-app products or subscriptions. Google Play handles checkout details so you never have to directly process any financial transactions, and your customers experience a consistent and familiar purchase flow.

Additional resources

Best practices for building and growing your app’s revenue streams.
Sell subscriptions through Google Play Billing to provide access to content and features on an ongoing basis.
Eliminate credit card and shipping forms from your app and drive higher conversions on purchases of physical goods and services.