I am designing a cross-platform application whose core application is a web/PWA application.
I want to distribute a very small native wrapper through the Apple App Store.
The customer would purchase the application once through the App Store. There would be no subscription, no developer-managed customer account, no developer password, and no cloud storage of the customer's data.
The customer's songs remain entirely on their device.
The native Apple wrapper would use StoreKit to determine whether the customer owns the application. If they do, the web application should operate in unlimited mode. If they don't, the web application should operate in a free mode limited to 10 songs.
Can an App Store-distributed native wrapper securely communicate the verified StoreKit entitlement to the embedded web/PWA application, without requiring my own customer account or licensing server?
If yes, what Apple-supported mechanism should be used to pass that entitlement from the native application to the web application?
Additionally, does Apple's App Store license for a non-consumable purchase automatically allow the purchaser to use the application on multiple Apple devices associated with the purchaser's Apple Account?