Ask AAQR: How do you tell if the app is hogging the CPU?

Someone asked how would I know if the app is hogging the CPU?

There are two ways:

1) Use SeePU, an app that displays a small bar graph showing how busy your CPU is (also your memory, but that's optional)

http://www.appbrain.com/app/seepu/com.latedroid.seepu

2) Use Watchdog Task Manager Lite, which watches your CPU and raises an alert if one app is hogging the CPU

http://www.appbrain.com/app/watchdog-task-manager-lite/com.zomut.watchdoglite

I use Watchdog right now. If an app repeated triggers the CPU alert (on default setting) I call it a CPU hog.