Simple IAP System is a Unity tool designed to simplify the implementation of in-app purchases for mobile and desktop games. The system provides an easy-to-use framework for managing consumables, non-consumables, and subscriptions with clear, organized logic. It supports quick setup, clean code structure, and smooth integration with Unity IAP services. Developers can easily trigger purchases, handle callbacks, restore transactions, and manage user entitlements. Simple IAP System is ideal for monetization in casual, hyper-casual, and premium games, helping developers add reliable purchase functionality, improve revenue flow, and maintain a smooth user experience across multiple platforms.