Usage Timelines Pro

CPU and process monitor with graphical load history. It shows you when & which app overloads your phones cpu so you can stop it.

Usage Timelines Pro has a 4.5-star rating on the Android market and many avid users.

* extended cpu load history as notification in the notification bar (like xload/windows task manager)
* process listing
* cpu and memory usage of processes (similar to "top" or windows task manager)
* processes can be terminated and uninstalled
* very low power usage
* start/stop widget
* no ads
* Supports English and German
* works without rooting
* Tested on Android 1.5 till Honeycomb

If you have suggestions to improve Tasks To Do, mail me under achim.leubner@googlemail.com!

Some remarks about performance (percent values are for an HTC Desire).

- tl;dr
Set your update intervals as high as acceptable for you. Power consumption should be fine then.
Shorter update intervals lead to higher power consumption since the values are updated more often.

- Usage Timelines has been highly optimized (e.g. the history notification uses 0%-1% of the cpu power with an update interval of 2 seconds if the screen is on).
- If everything is fine, Usage Timelines should be the app in the app list that uses most cpu since all other apps should be paused by android. That's normal and expected behavior.
- Displaying the process list needs some additional power, especially if you are working with the app (e.g. scrolling). Without scrolling etc. this is about 1-2% for an 5 seconds update interval. If the process list is not shown (e.g. while you are using another app), the process list does not use any cpu power.
- If the screen is off, only the values for the notification history are acquired to be able to properly update the usage history as soon as the screen is switched on again. Neither the notification history nor the process list are updated if the screen is off since you could not see the update anyway, saving cpu power and lowering power consumption.