[iOS] Promoting In-App Purchase on AppStore

Description

Since iOS 16.4, it's possible to promote Proxyman's InApp Purchase which allows users to directly purchase on AppStore.

⚠️ This feature is only available on iOS 16.4 or later. We don't support this ticket on iOS 16.3 or prior.

Appetance Criteria

• Add new Promotion Asset on AppStoreConnect. It's done & approved by Apple Review Team (See the section App Store Promotions on AppStoreConnect)
• Use PurchaseIntent class to handle the purchase from AppStore (See the read more)
• Support all InAppPurchase: Monthly, Yearly and Lifetime
• use if @available(iOS, 16.4) to support this feature on iOS 16.4 or later.
• Find a way to test it ?

Read more

1. https://developer.apple.com/app-store/promoting-in-app-purchases/
2. https://developer.apple.com/documentation/storekit/purchaseintent
3. https://developer.apple.com/documentation/storekit/in-app_purchase/supporting_promoted_in-app_purchases_in_your_app