Swipe vertically to adjust brightness; swipe horizontally to adjust hue.
- Keeps device and screen awake. - No ads. - No dodgy permissions. - Small download size.
There are a number of advantages to using a red light over a white screen or your camera flash:
1) Red light preserves your night vision 2) Red light is less noticeable in the dark, so you can read while sharing a bed or room without disturbing others, and 3) Blue/white light disrupts your circadian rhythms, delaying the release of the sleep-inducing hormone melatonin and making it harder for you to fall asleep.