So I am admittantly a noob at android. My friend has a mytouch, and he has an app I think is called AppKiller. Its essentially a task manager that allows him to view running processes and force quit them. He says he needs this because apparently if you just back out of an application it doesnt fully close. Is this true? Is this app needed? I kind of have trouble believing Android would be that inefficient. Is it just dropping pointers or actually still running the programs in the background? Again he has a mytouch? Maybe just that phone? Maybe earlier versions of Android? I am looking at getting a Nexus One.... do I need to get this (or similar) App to keep my phone running well without reboots?