Geek asks and answers

How to store purchases in the application for offline access for each user

It seems that keychain in iOS stores data for each application, and not for each user.

So, if I store the purchase information in the application in the keychain, these products will remain on the device, regardless of which Apple ID is currently registered.

I may need to access the network and perform a restore to find out which products should be available, but it seems like the wrong practice is that the registry is not initiated by the user. In addition, the application should function normally offline.

My question is: how to protect in-app purchases from access to non-Apple-id users who bought them?

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You need to organize user authentication - make your users create accounts in your service and provide in your application the ability to enter and exit for them. After starting the application, he must check which user is logged in and ensure that the in-app purchases for this user.

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