Apps may not use their own mechanisms to unlock content or functionality, such as license keys, augmented reality markers, QR codes, cryptocurrencies and cryptocurrency wallets, and so on. Apps and their metadata may not include buttons, external links, or other calls to action that direct customers to purchasing mechanisms other than in-app purchase.
This requirement means that consumers often pay higher prices for digital goods purchased through iOS apps because developers must factor Apple's commission into their pricing, and developers cannot legally offer a lower price by directing users elsewhere.
Apple's App Review Guidelines directly affect what apps consumers can access, what data those apps may collect, and how they can pay for digital content — Apple's mandatory in-app purchase requirement means app developers cannot offer cheaper prices through external payment links on iOS. Consumers benefit from Apple's content and privacy review standards, which prohibit apps from collecting data beyond declared purposes and require age-gating for adult content, but have no direct appeal mechanism if Apple removes an app they rely upon. You can review an app's declared data practices by checking the App Privacy section on any App Store listing before downloading.