In-app purchases can be made without using real money thanks to the ubiquitous feature of virtual currency found in many mobile apps & games. You can acquire this virtual currency through gameplay, receive rewards for using the app, join rummyor buy it with real money. Developers can establish a closed-loop economy in their app where users can earn and spend virtual currency on in-app purchases and features. Apps can be used to buy virtual goods, unlock premium content, and expedite game progress, among other things, with virtual currency. Developers can enhance user retention and revenue prospects by providing virtual currency as a reward for user engagement or as an inducement for in-app purchases.