Implementing a Limited-Time Free Trial Feature for Your iOS App While Complying with Apple's Guidelines

Understanding Alternative Payment Methods for iOS Apps: When IAP Isn't Necessary or Suitable

Implementing In-App Purchases Using iOS 10's SKStoreProductRequest

The Benefits of Testing In-App Purchases Without a Sandbox: A Guide for Developers.

Understanding SFProductsRequest and In-App Purchases in iOS Development: Mastering Common Issues and Troubleshooting Techniques