App Store - Identify users who purchased a subscription
问题 When using subscriptions in iOS via in-app purchases is there anyway for me to identify users who have purchased the app? For instance, if I have an Android app as well how can I ensure an iOS user moving to the Android app doesn't have to re-purchase a subscription? Is it possible? 来源: https://stackoverflow.com/questions/23897158/app-store-identify-users-who-purchased-a-subscription