In-App purchases for users who already paid for the app

Question

My team and I developed a famous app (for WP7, also working on WP8). It has a lot of users who paid for the app. We now want to start using in-app purchases. My question is if users who initially paid for the app have to re-purchase the in-app purchases again? (-I don't hope so...)

Thanks for your help!

Answer 1

I got a response from the Microsoft Support. This was the answer:

If you publish the app under the same product id, what you can do is use the store receipt to check the purchase date of the app and if your customer purchased it before a certain date, unlock all features. Otherwise, they must use the in-app purchase function to gain full access.

Receipt documentation is below: http://msdn.microsoft.com/en-us/library/windowsphone/develop/windows.applicationmodel.store.currentapp.getappreceiptasync.aspx

One issue that you could run into, however, is WP7 apps do not support in-app purchases so this could present a problem if you wish to continue to support WP7 with the same product id.

Hope this help you too.