I've read around alot about people saying task killers aren't needed because Android is Linux based (not windows) and can handle all the apps in the background so theres not need for a task killer. My question is arent there apps or services that take up alot of memory and shouldn't be constantly running (without you knowing that is) For example there are apps that constantly update (recieve data) like Mail or twitter or Anti-virus (which constantly is on the guard for new apps or settings being changed). I also noticed that after taking pictures with my phone camera it said the camera was running when i already closed it. i checked running services under the settings and the camera was taking 74% of my usage (i did refresh many times to make sure it was running). I've came to the conclusion that task killer is good for a few apps that are constantly running in the background but not as much for apps that don't constantly run in the background (like games, after you close them) Can anyone correct me or share wisdom? P.S. I have bought Advanced Task Killer Pro and i'm curious as if it would truly hurt or help my battery or Processor usage. Even if is truly no needed is there ever a time when it could be useful?