1ON1 Piano is free for everyone to use, allowing an unlimited amount of received calls. Subscriptions give you the additional ability to place a call. Once subscribed to 1ON1 Piano, you can place an unlimited amount of calls. Subscriptions are managed through the app store where you first bought a subscription. For instance, if you first bought a subscription through Apple, it will be honored in the Google store, but you will need to manage it through Apple.