Originally Posted by dan330
hitting the home button only jumps to home and leaves the app open for use later.
hitting the back button till you are back at home.. drops out of the app while it closes it.
Not even. Read Multitasking the Android Way
If you back out and Android needs that app, it'll reload it, wasting battery. This is not
Windows. Why is everyone running it as if it were? (And even in Windows, a dll sitting in RAM doesn't use power.)
Of course if you run Greenify you don't have to worry about such things. Back out or go home and you'll usually find 0 apps running when you're in the launcher.