Active Screen Filter

Active Screen Filter is an app that activates a filter over your Android screen so it doesn't cause eye fatigue after relatively prolonged exposure.

The app options let you choose the minimum transparency for the screen image (70 percent by default), as well as the maximum transparency (500 lux by default).

Unlike similar apps, this one adjusts the brightness of your screen automatically, according to the ambient light. Other apps just place a static layer over the screen image.

Active Screen Filter is a filter app for the screen of your Android that helps you have well-rested eyes. At least in theory.