This simple torch app will help you illuminate dark areas, while preserving your device's battery life by allowing the LED flashlight to work even when the screen is off. It even comes with a battery percentage indicator to know exactly how much battery life you have left.
It works on both older Android versions, before Android 5.0 Lollipop, as well as newer ones, by detecting the device's Android version and choosing which is the best way to proceed.
The flashlight also features a button, that turns your screen completely white while still showing the battery level. That way you don't need to turn on your LED. When this feature is turned on the device will stay illuminated until you press the power button, or minimize the app.