iOS 6 and data usage tracking ability?

I was told by the support people at My Data Manager that
"iOS 6 stopped supporting the ability to continuously monitor in the ways necessary to track actual MB on a per app basis."

I saw my daughters data usage app that comes on her Samsung Galaxy S3 and it was so nice!! So I looked for an app for my iPhone 4S that would tell me app by app how much data it used in real time, or at least daily. It would be so nice to be able to see which app is using the most data each day to better manage data usage. I am looking for something that would tell me actual data used in kb/mb/gb, not percentages.

But like I said, apparently with iOS 6 Apple stopped supporting that ability for iPhones. I wonder why??

Does anyone know of a good app by app data usage monitor for iPhone?
Thanks
Connie

 

What does that mean?

Edit:
Ok I googled it and it must mean Nevermind.
But why someone would post that to a question....is beyond me. LOL!

I guess no one has any answers for me on Data Managers.
Thanks anyway!