You don't want your users leave your app when referring them to other apps in the iTunes App Store? This plug-in is what you need!
It displays a native App Store window within your Unity iOS-App that allows the user to purchase other media from the App Store. For example another App specified by its Appstore-ID.
This plug-in is a wrapper for the SKStoreProductViewController which is part of the iOS StoreKit.framework available in iOS 6.0 and later