title: Convert released iPhone/iPad app to Universal
body: <p>I have an app that has been released on the app store with separate versions for iPhone and iPad. Now I wish to convert the app to a Universal version but I have an issue which I'm not sure can be resolved.</p>
  
  <p>Both versions of the app use a different bundle identifier (for example com.mycompany.app.iphone and com.mycompany.app.ipad). I want the new (universal) version to overwrite either of the old versions when downloaded from the app store. To complicate matters further, core data stored for that app needs to be retained.</p>
  
  <p>I'm not sure its possible and perhaps the protocol is to release the universal version under a new bundle identifier and have users start again but if a workaround is available it would be really helpful.</p>