Night owl - screen dimmer app for android description: Night owl enable you to reduce the brightness of your device screen lower than you can achieve with the default settings in order to avoid eye strain or headache in a dark environment or at night.
If you have an amoled display you can also save battery!
Functions screen dimmer: adjust the backlight brightness lower than default automatic start and stop: start and stop the service at a specific time blue light filter: reduce the blue light to protect your eyes.
Blue radiations can cause insomnia.
Advanced filter: adjust red green and blue value of the filter