App developers can boost income while maintaining a satisfying user experience by making effective use of in-app advertisements. To get the most out of in-app advertising, placement, frequencycash slots, and relevance to the app's content must be carefully considered. A major source of income for many mobile apps, especially those in the gaming and entertainment sectors, is now in-app purchases. Users can purchase virtual goods, premium features, or subscriptions within the app with in-app purchases, improving their experience and giving developers a consistent source of income.