title: Any (early) experiences with auto-renewable subscriptions for iOS
body: <p>Apple finally introduced the so called <a href="http://developer.apple.com/library/ios/#documentation/NetworkingInternet/Conceptual/StoreKitGuide/RenewableSubscriptions/RenewableSubscriptions.html%23//apple_ref/doc/uid/TP40008267-CH4-SW2">auto-renewable subscriptions</a> yesterday. Since I only have few (sandbox-only) experiences with in-app-purchase, I'm not sure that I got it all right here. It seems one <em>needs</em> a server side verification of the receipts. It seems the only way to find out if the subscription is still valid, is to store the original transaction data on server side. Apples programming guide with respect to this topic is all cryptic to me.</p>
  
  <p>My expectation was, that I can work with an iOS client only, by just asking iTunes via store kit api did he/she already buy this (subscription-)product and receiving a yes/no answer <em>together</em> with an expiration date.</p>
  
  <p>Does anyone have experiences with auto-renewable subscriptions or (because they seem somehow similar) non-consumable products? Are there any good tutorials about this?   </p>
  
  <p>Thank you.</p>