On iOS 11 and later, users can view and start an in-app purchase from your product page. In-app purchases and subscriptions are shown in two separate sections on your product page, and you can showcase up to 20 total items across both of these sections. You can even choose the order in which to list them to help drive awareness for specific content. Each item has its own display name, promotional image, and description. In-app purchase names are limited to 30 characters and descriptions are limited to 45 characters, so be descriptive, accurate, and concise when highlighting their benefits.
In-app purchases can also appear in search results and be featured on the Today, Games, and Apps tabs. When users tap on an in-app purchase in these locations, they are taken to your product page where they can read your app’s description, view screenshots and app previews, or start the in-app purchase. If they don’t have your app installed on their device when they start the in-app purchase, they will be prompted to download or purchase the app to complete the transaction.
Your app must support the new SKPaymentTransactionObserver method to make in-app purchases available on the App Store.
For more details, see Promoting In-App Purchases.