I have developed several applications that live in the AppStore. Now I want to develop a main application that will contain existing applications that are in the store, like in-app purchases, as well as other elements, such as in-app purchases.
Explanation
I published 5 lessons as standalone applications on the AppStore. Suppose the name is a, b, c, d, e
I want to create the main application "MAIN", which will consist of various courses, and these courses will include lessons that include (but are not limited to) a, b, c, d, e. These lessons will be available as inapp purchases.
I want to give lessons for free to those users who bought my previous applications a, b, c, d or e. For example: if the user has purchased applications a, b and c, now he downloads "Main". Then in “Main” lessons a, b and c will be included without charging a fee for the purchase of the application.
Initially, I was thinking about the canOpenURL / url methodology, in which I would ask if a, b, c, d, or e exist through the main application. If any / all applications exist, the lessons corresponding to these applications will be available as a free download in the main application. I implemented the same thing that works great during testing.
The problem with canOpenURl is that it is device specific. What if the user installs a, b and c on the iPhone 5 and installs the main application on the iPad. How do I know if user installed a, b, and c through the main application?
My limitation is that I cannot ask the user for emails, passwords or any unique identifier.
Is it possible to query the purchase history of applications (rather than purchases in applications) so that I can filter the applications purchased by the user that were developed by me? Obviously, if it had passed, asking the user to give their Apple-ID. I understand this, but is it possible?
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