This is a paid asset, but now you can download Simple IAP System Free.
Detail this asset from Unity Asset Store: Original Link
Simple IAP System v4.3.5 (Latest version)
Simple IAP System v4.3.2
Simple IAP System v4.2
Simple IAP System v3.3
“If possible, please buy the package to support the developer”
Simple IAP System (SIS) simplifies In App Purchase management. If you would like to sell in-app products for real money or virtual currency while maintaining a store inventory for your users, we’ve got you covered!
Web Player | Video tutorial
Interested? Ask us on the Unity forums.
Looking for support? Visit our support forums.
HOT: Steam, Facebook, PayPal and Oculus (Rift & GearVR) platform support. Please see the platform matrix screenshot for all supported stores.
* Simple-to-use IAP Settings Editor
* Real Money & Virtual Currency Purchasing
* Dynamic Shop Layout & Shop Templates
* Unity UI integration
* Localized Online Item Data from the stores
* Item Selection Modes (select/deselect)
* Locked Items based on Player Progress
* Local Storage of IAP Data and custom Data
* Client-Side Receipt Validation
* Virtual Reality sample scene for Oculus
(Optional) Features when using PlayFab:
* Cloud Save for currency & IAP products
* Remotely update your virtual products
* Server-Side Receipt Validation
Supported 3rd party plugins:
* Unity IAP (required)
* Voxel Busters
* Stan’s Assets