None here recommended auto task killer (op didn't ask about auto task killers...you are the one who posted auto task killer link to support your response). What I'm saying is that you are oversimplifying. You don't know what phone he had. He has a right to ask the question. Preventing certain apps from autostarting (which is different than killing) may a good solution for him, and the response "don't worry about anything to do with memory" (paraphrased) is not appropriate imo, at least without more info.