Task Killer is a powerful utility for Android devices that can help you get rid of unused background processes and free up memory, speeding up your phone. It is an ideal tool for users who want to keep their device performance at its maximum level. 

This utility has an intuitive user interface, which makes it super easy to use. The first thing that you need to do is to select the task to be killed. Next, you need to choose the method of killing the desired app. You can decide to close the app or stop it. You can also set the time to start the process. 

After that, you need to wait for the app to be killed. You can check the app's status to know whether it is still running.