Tracking data usage

[bergman]

Its time to plan ahead for upgrading to a 3G iPad. What's the best app to use to track my current wifi data? I want to project my 3G needs for selecting plan. Useful feature would be an alert when approaching a predetermined level.I'm not jailbroken.

 

[andrewshah]

If you want to jailbreak, there is an app called "Data Counter"
Has all the features you need.