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

Enabling In-App Purchases in iOS Apps: A Step-by-Step Guide to Success

Understanding and Mastering iOS In-App Purchase: A Step-by-Step Guide for Identifying Non-Consumable Products

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

Mastering In-App Purchases with Urban Airship and iTunes: A Comprehensive Guide