title: iOS in-app purchase. Need clarification
body: <p>I am planning to use subscription (auto renew) type of in-app purchase. My idea is to allow one subscription per device. (i.e.) if someone purchase the subscription on iPhone, he shouldn't be able to use same subscription on iPad. Instead I want to force user to new subscription for other device. But from in-app purchase what i understood is that, if user subscribe for a particular item, if he tries to purchase the same thing again, app store allows to user to restore already purchased item.</p>
  
  <p>As per my current setup, all the downloads will happen from a separate server and I am going to keep all the receipts and content in that server. In order to implement this particular thing, what should I do in my application? Could someone help me on this?</p>
  
  <p>Also if I want to limit download of data from server using in-app purchase for only 3 device? Beyond 3 I want user to make payment via in-app purchase again? How will I do this? </p>
  
  <p>Thanks</p>