Potentially useful
I dont see how to distinguish between wifi and 3G/4G. For how much this app costs there should be much more detailed information. Without being able to separate this data it really doesnt show anything since wifi is separate from any plan. Also it would be nice if there was a setting to put your plan in gigabytes when setting up instead of just megabytes.
Sodaguy about
4Glob - Mobile Internet Data Tracker