Chessbase 13: Manage Openings app

Hi

With Chessbase 13 you also have access to their cloud apps.

One being the "Openings" app where you can enter your opening lines and then practice them online...which is nice.

You can also have your databases stored in the cloud.

My question is:

As most people, I have created a repertoire database in chessbase.

To practice your opening lines, the cloud app appears to be a nice tool.
But that would appear to mean; you would be duplicating what you already have in chessbase, in this cloud app?

At first I thought you could simple move the existing repertoire database to the cloud and use the Opening app to practice against that...only having one Opening database which you can open in Chessbase or in your browser and use the app to practice your line.

But I don't think the Opening App works that way. I you enter moves in the app, it doesn't create a seperate cloud database which can opened through Chessbase....so it seems the Opening App is a complete duplication of your existing repertoire database?

Anyone who shared my experience or am I missing something here?