question

Our app needs to determine which type of subscription period the user has purchased (12 months or 1 month), for the purposes of granting them an amount of free content (the longer the subscription period they sign up for, the more free content they get). However, the response from the IAP tester and the receipt verification from the server-side sandbox tester only ever provide the 'parent' SKU, not the individual SKUs for the subscription period chosen. e.g. the user selects the '12-month period' from the drop-down list in the IAP tester (SKU: sub.weeklycontent.12months), but all that gets returned to the app is the sub.weeklycontent 'parent' SKU. Is there any way to get the SKU for the period chosen, or should we just only ensure that we have one subscription period per 'parent' SKU in order for our functionality to work?