Subscription change from Subscription screen

Question

Now we grouped the subscription in the way that the user have possibility to downgrade/upgrade or cancel the current subscription from a Subscription Screen (settings/appleId/iTunes&AppStore..).

How to handle this case of user subscription change in app or on the server side ?

Answer 1

In app: You should get a callback in SKPaymentObserver with the new transaction. It will usually be with the same originalTransactionID.

Server: Use server to server notification detailed here https://itunespartner.apple.com/en/apps/news/45333106