So I upgraded from the 250 mb plan to the 3 gb plan after buying my 3rd gen iPad. I just have to get a handle on how much data I use I can report that DataUsagePro has been spot on for the last week. The one item I dislike about the program is that it resets the counter every month, instead of every 30 days like my AT&T plan does. Any suggestion on a better monitor program? I would also like to report that if I place the iPad in the truck away from my free WiFi network, I seem to use about 1 mb a day, even if I just leave it behind the seat or 8 hours. Guess this is just normal communications where the iPad is checking email, gps location, etc..