Monetize your app with the Publisher SDK for Android from ayeT-Studios
ayeT-Studios Publisher SDK allows you to easily monetize your app and reward your users with in-app currency. Your users get access to our offerwalls, allowing them to earn currency for completing tasks such as trying new apps, answering surveys, signing up for free trials or watching video ads. The integration is simple, allows both managed (our servers store user information and balances) and unmanaged (you receive callbacks and handle use wallets yourself) currencies and also works well alongside traditional in-app purchases.
Publisher SDK documentation: