Track data by app

[clucernoni]

I am looking for an app that will track my data usage (3g and/or Wifi) by each application I have on my phone. I have noticed that my networks usage has gone way up recently...I am using around 150Mb per day, and while i do listen to pandora often, i feel this is too much.

Any suggestions would be great.

PS, I already have a data usage monitor, but it doesn't break it down by app.

Thanks.