In-app purchase offers additional revenue streams for developers other than the initial purchase from the App Store. This can be great for unlocking functionality, providing additional content or for in-game currency. Since app store pricing has been driven through the floor, IAP is often thought of as the best way to monetize apps, so it’s definitely worth discovering how to implement it. In this video tutorial series you’ll learn how to integrate in-app purchase in your apps. Covering the dance with iTunes connect, integration with StoreKit, restoration of previous purchases and receipt validation, by the end of the series you’ll have a great understanding of the concepts behind IAP.
This is a companion discussion topic for the original entry at https://www.raywenderlich.com/4158-in-app-purchase