If a user, while using the app makes any type of purchase for goods or services, it is referred to as in-app purchasing. Through the in-app purchase method, one can offer their app to users for free. There are a lot of advantages in-app purchases provide to developers or app owners. One can incorporate in-app purchases and lure users to make:
App upgrades to the paid version
Special features to unlock through payment
Virtual Special items or entities for sale
Through in-app purchases, an app owner can earn money despite offering an app to users for free.