Mit wAma gibst Du nur noch so viel Geld aus, wie Du willst!

Quick Shortcut (QS) apps allow you to launch various Android setting pages, or application pages, fast and easy. Rather than tapping through multiple setting screens to get there, use Quick Shortcut apps with one tap. Put shortcuts on your home screen or arrange them into folders. Customize your Android device desktop as you wish.

It is a battery percentage level indicator app. Its size is only 500 KB. So this app is so lite and never uses RAM & Battery with improved & lite UI.