from Hacker News

According to the identifierForVendor documentation: The value of this property is the same for apps that come from the same vendor running on the same device. A different value is returned for apps on the same device that come from different vendors

Given that we're about to be able to transfer ownership of apps from one vendor to another, does anyone know if the identifierForVendor id will then change?

https://developer.apple.com/library/ios/#documentation/uikit/reference/UIDevice_Class/Reference/UIDevice.html#//apple_ref/occ/instp/UIDevice/identifierForVendor