Track your 3G

Track your data ( 2G / 3G ) consumption based on your plan conditions.
Fill in your reinit. day, your data credit and your overrun cost (if applicable), and use the notification or widget gauge to stick to your plan.

Exclusive feature for Android 2.2+ devices and HTC 1.5+ devices : Per application 3G and wifi consumption (doesn't work on 2.1 Galaxy S, but fine on 2.2 - might work for other brands with less than Android 2.2 but untested).

Exclude from task killers (this app HAS to run as a background service and it won't kill your battery).

Similar to 3G Watchdog pro, but cheaper ;)