A common method of making money off of mobile games is through in-game currency, which lets users buy virtual goods with real money to use in the app. Then, you can use this money to buydownload free slots in-game stuff, get features unlocked, or finish the game faster. Incorporating in-game currency allows developers to generate extra income streams while giving players an opportunity to improve their gaming experience. The in-game economy must be carefully balanced, & developers must make sure that in-game money and item prices are reasonable and add value for players.