Measures time spent on each app. See which apps to uninstall because you're not using them!
The most accurate app usage tracker! Accurate to less than a second on Android 1.6 and up.

Small but powerful cleaner and booster!

3G Traffic Lite is the free version of 3G Traffic Pro. It counts mobile internet traffic and save battery.

Network Counter is Android (2.2+) application for monitoring of wireless network data traffic.

Features:
- Displays data traffic usage statistics for Wi-Fi and cellular / mobile networks.
- Possibility to setup an alarm for Wi-Fi and mobile data traffic usage.
- Network traffic statistics for currently active (running) applications.
- Ability to backup and restore of data traffic usage database.