The Advanced Task Killer (ATK) is a handy tool for Android that allows you to perform advanced actions on your phone's taskbar. You can use this tool to remove any unwanted application that is running on your phone. In addition, you can use this tool to set the application you are currently using as your default application to run on your phone's taskbar.

The way to use this tool is very easy. First, you need to open it. Then, you need to select the apps you want to remove from your phone's taskbar. You will be able to remove any app that is listed on the running applications list.

After that, you need to select the level you want to use for the app you are using. You will be able to use the auto-kill level or the manual kill level.