If the iOS app I create emails the user, can the user upgrade from the link in the email or is that against the guidelines?
I want to create an iOS app and for a variety of reasons (subscription, multiplatform, etc) I can't use the Apple app-store payment sytem.
However, if the user creates and account with my iOS app and we then email the user at a later date. Can they upgrade from the link in the email, or is that against Apple policy as well?
Thanks!
Ryan
iPhone 4S, iOS 5.1.1, Purchase Guidelines