Transfer iCloud app data to other account

[timmbe]

Hi ,


My girlfriend has been using her iPhone with a shared iCloud account, and has downloaded apps (such as Whatsapp) with that account.


Now she finally created her personal account, which will be used to create back-ups as well as in Appstore.

The 'old' apps downloaded with shared iCloud, need to be updated with that particular account and need to switch every time an update appears for the 'old' iCloud account apps.



Is there any way to transfer the app data from one iCloud to another?

Or make sure the app is moved to the other iCloud's back-up?



Thanks