what happens on multiple purchase - Non-Renewal subscription in-app purchase

Question

I am implementing a sample which includes the in-app purchase feature. The subscription is of non-renewal type.

In case of auto-renewal subscription, if the user ha

Answer 1

Yes i am altering the subscription start date obviously, and i am getting this from the transaction. According to this subscription start date i am altering the expiry date as well.

The concern here is to avoid the user from getting charged again in any case if he has already subscribed. And, for that i am using iCloud to support restore functionality in user's multiple devices.