Night Shift - Bluelight Filter

Leap Fitness Group

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About this app

Blue light from the phone is a cause of eye fatigue. It disturbs your sleep and harms your eye health. The night shift function has been scientifically proven to reduce blue light. By adjusting the screen to soft light, it relieves eye fatigue, helps you sleep well and improves your vision health. 100% FREE and effective for eye care!

Features

√ Night filter shifts your screen to natural warm light
√ Help you gain one more hour of sleep
√ Protect your eyes for 24 hours with the auto-timer
√ Help maintain healthy eye habits
√ Save your battery by 15%
√ Get better sleep by reducing blue light
√ Ease eye fatigue with just one tap
√ Many colors to choose from

WHAT IS BLUE LIGHT?
Blue light is the visible light spectrum (380-550nm) for circadian regulation. It contains more energy than other visible light types, so it may damage your retinal cells.

WHY SHOULD I USE BLUE LIGHT FILTER?
Research shows that exposure to blue light imposes serious threats to retinal neurons, causes eye strain, dry eyes, and inhibits the secretion of melatonin, a hormone that influences circadian rhythms. With our night shift function, your vision health will be greatly improved.

CAN BLUE LIGHT FILTER IMPROVE MY SLEEP?
Yes. Natural exposure to blue light during the daylight hours boosts people's energy, alertness and mood; however, it will disturb your sleep at night.(from wiki) Blue light filter can effectively reduce blue light from the screen and help you get better sleep.

RELEVANT SCIENTIFIC STUDIES 
1. Steven W. Lockley, George C. Brainard, Charles A. Czeisler. “High Sensitivity of the Human Circadian Melatonin Rhythm to Resetting by Short Wavelength Light”. J Clin Endocrinol Metab. 2003 Sep;88(9):4502-5.

2. Burkhart K, Phelps JR. “AMBER LENSES TO BLOCK BLUE LIGHT AND IMPROVE SLEEP: A RANDOMIZED TRIAL”. Chronobiol Int. 2009 Dec;26(8):1602-12.

3. ----“Effects of blue lights technology”. https://en.wikipedia.org/wiki/Effects_of_blue_lights_technology

4. “How exposure to blue light affects your brain and body”. Nature Neuroscience; Harvard Health Publications; ACS, Sleep Med Rev, American Macular Degeneration Foundation; European Society of Cataract and Refractive Surgeons; JAMA Neurology

Ratings and reviews

I turn this on every night for when I'm laying in bed, browsing around on my phone to fall asleep. ... (to give you an idea the level of darkness) From sundown going forward; I turn on my phones's first level of Night dimmer (around dusk) .. then my phone's 2nd level of light dimmer, once it's dark outside. ... These are just right for using my phone anytime at night. ..... But when it's time for 'lights out' and getting in bed, and the room is dark, I need my screen brightness turned Way down.

Great app. Easy to use. On/Off are in the notification drop down. I can customize color filters & brightness and set the time to auto turn on and off if I want. A few apps won't respond unless I turn it off first and then turn it back on after but all the others do too.

I have tried multiple brightness managers, some had more features, or cooler design, but this app is just what I need. Simple, pretty clean, with the right functionalities. Below zero brightness and a blue filter - perfect combination.