In App Purchase Content for a Different App

I currently h开发者_如何转开发ave an app that is divided into multiple apps. I'd like to combine them all into a single application with the ability to use In App purchasing to download the parts currently held in multiple apps. Is there a way that I can allow people who currently own the individual apps to somehow make an In App purchase that unlocks the parts in the single app?

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The most obvious solution is to use a web server holding user accounts and in-app purchases. If you require an offline solution, I will suggest you to use iCloud Keychain, you can mark your apps sharing the same keychain in XCode.

To enable keychain sharing: -Select the target in XCode -Go to capabilities -Enable keychain sharing -Add a group with same name for all apps.

After all your apps will be able to reach this shared data.

If you are not familiar with keychain this tutorial will be a good start. Keychain is not that complicated.

EDIT: woops didn't even notice I'm answering a 3 year old question.