Transfer iOS app data to a different account
You can backup data from apps with a program such as PhoneView (Mac) or iFunBox (Mac &amp; Windows).


  Browse, manage and download most any data saved by App Store apps from your iPhone, iPad or iPod Touch. If you're looking for a quick way to download saved recordings, videos or images from your apps, this is it. Even transfer game high scores between devices. --PhoneView


This data can then be restored to a new installation of an app under a different Apple ID or even on a different device.