Bluetooth Power is here to make sure you never have to think about turning Bluetooth on or off ever again. Once you've installed the program (and opened it at least once, (per Android 4.x and higher - requirements), Bluetooth Power will turn Bluetooth ON once you've plugged your phone in, and turn it OFF once you've unplugged your phone. Think of it as your own personal Bluetooth Butler. It'll even turn Bluetooth OFF in 2 minutes if you haven't connected to another Bluetooth Device within that time period.
Simple? Yes. But sometimes, simple things are the best. Bluetooth Power does not take up any memory on your phone, nor does it consume any battery except for the instant in which you plug or unplug your phone – in fact, Bluetooth Power helps you save battery power by ensuring that Bluetooth is ON when needed, and OFF when it's not needed!