Starting today, Google have enabled in-app for apps that are sold through Play.Developers can use In-app Billing to sell monthly or annual subscriptions from inside of their apps. All subscriptions are auto-renewing, for every app and game and every type of subscription product. Developers just set the price and billing interval and Google Play manages the purchase transactions for them, just as it does for other in-app products and app purchases.
For users, Google Play provides a familiar and convenient purchase experience, highlighting subscription details such as price and billing interval before continuing with purchases. After the transaction, Google Play manages recurring billing and keeps users informed of new charges, sending them an email with each renewal. At any time, users can visit My Apps in the Play Store app to view their subscriptions and cancel any subscription as needed.