Advanced Task Killer

A standard Android phone usually has a set of four hard buttons—Back, Search, Home and Menu—depending on your device. When you run an app and press the Back button, you get back to the Home screen but the app is still running in the background. Surprisingly, quite a number of apps seem to behave this way without terminating themselves. To quit a running app, you would have to press Menu > Settings > Applications > Manage Applications > Running, then select an app to stop it from running. Advanced Task Killer makes your life easier—just one tap on "Kill selected apps" stops all the apps that you've chosen from running in the background. This reduces memory usage immediately and makes your device less laggy over extensive use. Alternatively, this app allows you to individually stop an app from running—just touch and hold an item on the list and select 'stop' to kill the item. You can also set an auto-kill level, either safe, aggressive or crazy, to your liking from the various settings. What's more, it has a one-tap widget. Touch and hold your homescreen, select Widgets from the pop-up menu, then choose this app's widget to place it on your homescreen for use. A touch on this widget instantly tells you the number of apps killed alongside the memory available. This app is free but supported with ads.