Mobile game monetization is a crucial aspect for developers to consider from the inception of a game, as it not only helps cover development costs but also generates profit. The landscape has evolved from simply choosing between a free app with ads or a paid app to incorporating diverse monetization models such as in-app advertising, freemium models with in-app purchases, and subscription services. Successful games like Flappy Bird and Candy Crush Saga exemplify the potential revenue streams, with in-app purchases being particularly lucrative, contributing significantly to app store revenues. Developers must strategically plan their monetization approach early on, choosing models that complement their game design to ensure a seamless and engaging user experience. The choice between free and paid models involves trade-offs, with free apps potentially attracting more users for long-term gains and paid apps offering immediate revenue. Additionally, developers can leverage various types of ads, such as banner, native, or reward ads, to optimize earnings without overwhelming users, thereby maintaining user retention and satisfaction.