title: In App Purchases reinstalling bypass android
body: <p>I am developing an application where the user can select 2 out of 4 items for free and the other 2 items are purchasable.</p>
  
  <p>It just occured to me that with this strategy, it would be very easy for the user to reinstall the app and then select the 2 other options he had not selected before in order to get access to the full content.</p>
  
  <p>Is there any way to prevent this?</p>