How to use StoreKit views to build a subscription app paywall with SwiftUI

In the guide, the introduction of Apple's StoreKit views at WWDC 2023 for iOS 17 is explored, highlighting the new SwiftUI APIs designed to streamline the implementation of in-app purchase paywalls. The guide elaborates on three main views: StoreView, ProductView, and SubscriptionStoreView, each offering varying degrees of customization for integrating paywalls into apps. StoreView provides a basic list of in-app purchases with minimal customization, while ProductView allows for more detailed styling and integration of individual product offerings. SubscriptionStoreView caters to single subscription groups, though it lacks support for one-time purchase options. The guide also addresses the limitations of these views, particularly their restricted styling options and functionalities, suggesting RevenueCat as a more flexible alternative. RevenueCat offers enhanced support for managing transactions, entitlements, and optimizing paywalls through experiments, with additional cross-platform capabilities and a more customizable paywall solution.