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Download Twilight for PC

folder_open Health & Fitness Latest version: 10.3 Updated:

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Google Play statistics for Twilight
Developer Size Tags Daily ratings Total ratings Release Date Updated Total installs Score Version Content rating
Urbandroid Team 5.3 MB 5,156 346,466 2013-03-05 2019-09-30 5,000,000+ 4.6 10.3 Everyone
Daily Ratings 5,156
To see the full description of Twilight, please visit on Google Play.

Download Twilight apk for PC/Mac/Windows 7,8,10

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Steps to download Android apps/games for phone

To download and install applications or games from our website to your smartphone:
1. Accept softwares installed from external sources (Settings -> Apps -> Unknown sources selected area)
2. Download the apk file of the application you need (for example: Twilight) and save to your phone
3. Open the downloaded apk file and install
Are you having trouble falling asleep? Are your kids hyperactive when playing with the tablet before bed time?
Are you using your smart phone or tablet in the late evening? Twilight may be a solution for you!

WARNING: Android O does no allow the app to cover your notifications any more..

Recent research suggests that exposure to blue light before sleep may distort your natural (circadian) rhythm and cause inability to fall asleep.

The cause is the photoreceptor in your eyes, called Melanopsin. This receptor is sensitive to a narrow band of blue light in the 460-480nm range which may suppress Melatonin production - a hormone responsible for your healthy sleep-wake cycles.

In experimental scientific studies it has been shown an average person reading on a tablet or smart phone for a couple of hours before bed time may find their sleep delayed by about an hour.

The Twilight app makes your device screen adapt to the time of the day. It filters the flux of blue light emitted by your phone or tablet after sunset and protects your eyes with a soft and pleasant red filter. The filter intensity is smoothly adjusted to the sun cycle based on your local sunset and sunrise times.

Get more from Twilight
1) Bed reading: Twilight is more pleasant on the eyes for night reading. Especially as it is able to lower the screen backlight far below the ability of the backligt controls on your screen

2) AMOLED screens: We have tested Twilight on an AMOLED screen for 2.5 years without any sign of depletion or over-burning. If properly configured Twilight causes less light emission (by enabling dimming) with more equal light distribution (dark areas of the screen such as the status bar get tinted). This may in fact increase your AMOLED screen life time.

Basics on circadian rhythm and the role of melatonin
http://en.wikipedia.org/wiki/Melatonin
http://en.wikipedia.org/wiki/Melanopsin
http://en.wikipedia.org/wiki/Circadian_rhythms
http://en.wikipedia.org/wiki/Circadian_rhythm_disorder

Permissions
- location - to find out your current sunset/surise times
- running apps - to stop Twilight in selected apps
- write settings - to set back-light
- network - access smartlight (Philips HUE) to shield you household light from blue

Automation (Tasker or other)
https://sites.google.com/site/twilight4android/automation

Related scientific research

Amplitude Reduction and Phase Shifts of Melatonin, Cortisol and Other Circadian Rhythms after a Gradual Advance of Sleep and Light Exposure in Humans Derk-Jan Dijk, & Co 2012

Exposure to Room Light before Bedtime Suppresses Melatonin Onset and Shortens Melatonin Duration in Humans Joshua J. Gooley, Kyle Chamberlain, Kurt A. Smith & Co, 2011

Effect of Light on Human Circadian Physiology Jeanne F. Duffy, Charles A. Czeisler 2009

Efficacy of a single sequence of intermittent bright light pulses for delaying circadian phase in humans Claude Gronfier, Kenneth P. Wright, & Co 2009

Intrinsic period and light intensity determine the phase relationship between melatonin and sleep in humans Kenneth P. Wright, Claude Gronfier & Co 2009

The Impact of Sleep Timing and Bright Light Exposure on Attentional Impairment during Night Work Nayantara Santhi, Daniel Aeschbach & Co 2008

Short-Wavelength Light Sensitivity of Circadian, Pupillary, and Visual Awareness in Humans Lacking an Outer Retina Farhan H. Zaidi & Co, 2007

High sensitivity of the human circadian melatonin rhythm to resetting by short wavelength light. Lockley SW, Brainard GC, Czeisler CA. 2003

Sensitivity of the human circadian pacemaker to nocturnal light: melatonin phase resetting and suppression Jamie M Zeitzer, Derk-Jan Dijk & Co 2000

For a desktop alternative, try RedShift (Linux) or on Windows the app which has no relation to this project whatsoever, whose name cannot be said aloud or whispered as it is a Trademark, lets call it Lord Voldemort of the blue light flux filtering apps.Guessed it? Let us know in the comments.
App Name Developer Size Tags Daily ratings Total ratings Release Date Updated Total installs Score Version
Blue Light Filter - Night Mode, Eye Care Leap Fitness Group 6.7 MB -47 276,530 2016-07-15 2019-09-25 10,000,000+ 4.7 1.4.7N
Bluelight Filter for Eye Care Hardy-infinity 4.6 MB -483 338,955 2013-09-14 2019-09-01 10,000,000+ 4.3 3.2.0
Night Shift - Blue Light Filter, Night Mode Ascendik 3.6 MB 10 54,655 2017-02-17 2019-02-17 1,000,000+ 4.7 3.06
Darker (Screen Filter) mlhgdevelopment 128.1 KB 2 15,810 2013-10-19 2018-02-09 1,000,000+ 4.4 3.1
Bluelight blocking - Eye protection kim j.h 3.8 MB 1 1,027 2014-10-24 2019-02-07 100,000+ 4.2 3.18
Bluelight Filter PANAGOLA 185.9 KB 7 7,354 2015-11-18 2019-02-10 500,000+ 4.6 7.3.3
Night screen Arrows app 2.3 MB -91 84,041 2015-02-14 2018-03-04 5,000,000+ 4.6 11
sFilter - Blue Light Filter Siso Mobile 2.2 MB 3 6,264 2016-06-20 2019-04-09 500,000+ 4.5 1.6.3
Bluelight Filter - Night Mode Geeks.Lab.2015 2.9 MB 5 42,888 2015-04-14 2019-03-17 1,000,000+ 4.6 1.3.52
Dimly - Screen Dimmer Ricardo Solano 1.1 MB 16 46,883 2014-07-10 2017-01-21 1,000,000+ 4.6 0.7.2
Night Shift - Bluelight Filter for Good Sleep Leap Fitness Group 6.1 MB 2 1,678 2019-01-20 100,000+ 4.6 1.0.6
My Eyes Protection kapron-ap 4.3 MB 3 3,769 2016-03-14 2018-10-11 500,000+ 4.4 2.5.7
f.lux (preview, root-only) justgetflux 3.7 MB 1 5,933 2016-03-14 2016-03-15 500,000+ 3.7 22.0
Night Owl - Screen Dimmer evezzon 3.4 MB 5 14,958 2015-10-11 2018-11-16 1,000,000+ 4.5 3.01
Screen Filter haxor industry 90.5 KB -65 126,401 2010-11-17 2013-11-23 5,000,000+ 4.5 1.3
Bluelight Filter - Eye Care MeiHillMan 3.3 MB 9 38,478 2015-01-31 2019-03-16 500,000+ 4.6 1.5.90
Lux Lite Vito Cassisi 2.3 MB 3 18,442 2013-02-23 2015-10-05 1,000,000+ 4.2 v1.0-2015-09-08l
Night Mode Bruno Barão 538.2 KB
-122 98,466 2012-04-30 2012-05-25 5,000,000+ 4.4 1.0.1
Sleep Cycle alarm clock Northcube AB 30.1 MB 77 70,686 2014-06-16 2018-03-07 5,000,000+ 4.5 2.0.1768
Lower Brightness Screen Filter Nu-Kob 2.9 MB 14 23,278 2015-05-22 2018-10-25 1,000,000+ 4.5 1.8.0
Headspace: Meditation & Mindfulness Headspace, Inc. 22.0 MB 1,659 106,335 2012-01-06 2019-09-08 10,000,000+ 4.4 3.34.0
Night Mode - blue light filter, eye protector EyeCare Lab 1.6 MB 0 1,501 2017-02-24 2017-08-19 100,000+ 4.5 1.1.4
Blue Light Filter – Screen Dimmer for Eye Care Health Group: Fitness, Eyes Protect, Drink Water. 12.8 MB 6 80,840 2016-06-07 2019-07-04 5,000,000+ 4.5 3.3.3.6
Relax Melodies: Sleep Sounds Ipnos Software 82.5 MB -186 267,865 2011-12-21 2019-04-29 10,000,000+ 4.6 7.10
Bluelight Filter Lite Hardy-infinity 963.5 KB 0 356 2017-04-28 2018-08-30 50,000+ 4.2 1.1.1
Eye Protector courysky 1.9 MB
9 11,227 2015-01-12 2019-02-06 1,000,000+ 4.6 1.9.1
Eye Filter (Blue light filter) diaohs 1.7 MB 1 4,642 2015-12-26 2018-03-24 100,000+ 4.6 9.0.0
Night Mode for Samsung tbWhale 2.0 MB 5 9,085 2016-11-17 2019-01-17 1,000,000+ 4.4 2.3
Midnight (Night Mode) Mokaware 7.3 MB 0 5,773 2015-12-21 2018-11-15 100,000+ 4.5 3.1.7
Screen Dimmer Wormhole Space 3.0 MB 2 1,949 2018-01-09 2018-09-21 100,000+ 4.5 1.0.2
Sleep as Android Urbandroid Team 18.0 MB 4,433 291,642 2010-10-24 2019-08-22 10,000,000+ 4.4 20190819
EyeFilter - Bluelight Media Life Inc 4.8 MB 1 21,523 2015-02-14 2018-10-29 500,000+ 4.4 2.2.4
Blue light Filter - sleep better, best eye care fruitranger 424.2 KB 3 1,283 2017-09-03 2017-09-09 100,000+ 4.6 1.1.3
Alarmy (Sleep If U Can) - Alarm clock Delight Room Co., Ltd 21.9 MB 13,946 917,872 2012-08-22 2019-07-17 10,000,000+ 4.7 4.12.0
Dream Talk Recorder MobiUtil 3.1 MB 2 5,005 2013-12-22 2016-12-17 1,000,000+ 4 3.6
Night Mode-Battery & Eye Saver YourRockstarCare 3.0 MB 1 1,872 2015-02-15 2018-01-22 500,000+ 4.3 2.1
Night Screen Paper Airplane Dev Team 301.2 KB 3 7,085 2016-02-01 2019-02-16 500,000+ 4.4 2.2.0