Version 4.6
Rating 4.6
Requires Android Varies with device
Content Rating Everyone
Installs 5M+
Updated At March 29, 2015
Size Varies with device
Get it on Google Play
Download Twilight: Blue light filter 4.6 APK
Twilight: Blue light filter 4.6 APK is a Health & Fitness App offered by Urbandroid (Petr Nálevka). This version comes with several changes and improvements. You can download Twilight: Blue light filter 4.6 APK by clicking the button below.
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.
Documentation
http://twilight.urbandroid.org/doc/
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 & 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 & Co. 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.
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.
Documentation
http://twilight.urbandroid.org/doc/
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 & 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 & Co. 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.
You can check other versions of Twilight: Blue light filter APK below.
Twilight: Blue light filter APK other versions
- Twilight: Blue light filter 12.10 - August 23, 2021
- Twilight: Blue light filter 12.9 - August 15, 2021
- Twilight: Blue light filter 12.7 - June 26, 2021
- Twilight: Blue light filter 12.6 - May 20, 2021
- Twilight: Blue light filter 12.5 - May 17, 2021
- Twilight: Blue light filter 12.4 - March 12, 2021
- Twilight: Blue light filter 12.3 - January 24, 2021
- Twilight: Blue light filter 12.2 - January 19, 2021
- Twilight: Blue light filter 12.0 - October 13, 2020
- Twilight: Blue light filter 11.8 - September 6, 2020
- Twilight: Blue light filter 11.5 - August 9, 2020
- Twilight: Blue light filter 11.4 - June 8, 2020
- Twilight: Blue light filter 11.2 - April 27, 2020
- Twilight: Blue light filter 11 - December 26, 2019
- Twilight: Blue light filter 10.4 - November 5, 2019
- Twilight: Blue light filter 10.3 - October 5, 2019
- Twilight: Blue light filter 10.2 - August 22, 2019
- Twilight: Blue light filter 10.1 - August 13, 2019
- Twilight: Blue light filter 9.9 - June 23, 2019
- Twilight: Blue light filter 9.8 - May 6, 2019
- Twilight: Blue light filter 9.6 - April 25, 2019
- Twilight: Blue light filter 9.4 - December 3, 2018
- Twilight: Blue light filter 9.1 - November 5, 2018
- Twilight: Blue light filter 9.0 beta - September 12, 2018
- Twilight: Blue light filter 8.3 - May 28, 2018
- Twilight: Blue light filter 8.2 - March 13, 2018
- Twilight: Blue light filter 8.1 - December 10, 2017
- Twilight: Blue light filter 8.0 - November 19, 2017
- Twilight: Blue light filter 7.9 - October 25, 2017
- Twilight: Blue light filter 7.8 - October 15, 2017
- Twilight: Blue light filter 7.7 - September 28, 2017
- Twilight: Blue light filter 7.6 - September 12, 2017
- Twilight: Blue light filter 7.5 - August 13, 2017
- Twilight: Blue light filter 7.3 - March 30, 2017
- Twilight: Blue light filter 7.0 - January 11, 2017
- Twilight: Blue light filter 6.9 - November 24, 2016
- Twilight: Blue light filter 6.8 - September 28, 2016
- Twilight: Blue light filter 6.7 - October 16, 2016
- Twilight: Blue light filter 6.6 - July 17, 2016
- Twilight: Blue light filter 6.5 - June 12, 2016
- Twilight: Blue light filter 6.3 - March 28, 2016
- Twilight: Blue light filter 5.9 - February 21, 2016
- Twilight: Blue light filter 5.7 - February 16, 2016
- Twilight: Blue light filter 5.6 - January 31, 2016
- Twilight: Blue light filter 5.4 - December 17, 2015
- Twilight: Blue light filter 4.9 - November 8, 2015
- Twilight: Blue light filter 4.8 - November 4, 2015