Описание тега android-billing
Android In-app Billing is a Google Play service that lets you sell digital content from inside your applications.
You can use the service to sell a wide range of content, including downloadable content such as media files or photos, virtual content such as game levels or potions, premium services and features, and more. You can use In-app Billing to sell products as:
Standard in-app products (one-time billing), or
Subscriptions, (recurring, automated billing)