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Urbandroid Team,

Store Category Version Last Update Avg. ratings
Android Health & Fitness 8.1 December 11, 2017 4.59

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App Description
The length of your description looks great. 4070 characters

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Ok, that's perfect.

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Your last version was released more than 3 months ago. Update your app with new features and/or some bug fixing.

Version 8.1 released on December 11, 2017
- fix for Android 5.X auto-pause in apps issues
- fix for Chromebooks
- Black quick settings tile panel with Android 8.1 and home screen filtering enabled

- Because of wallpaper filtering the app may require the storage permission on some phones, but if you are not using this you can revoke the permission after updating
- get rid of Accessibility option for auto-pause in apps as of new Play Store policies (if you are still using this, please re-configure)

Version 7.8 released on October 16, 2017

Version 7.7 released on September 29, 2017
- ability to filter lock screen / home screen wallpaper separately, support for different wallpaper on lock screen and home screen
- only lock screen wallpaper filtering is now default on oreo
- link to help translate the app for every one (menu - translate the app)
- fix for Oreo's annoying "X apps running in background" notification, look for "Hide notification" on the main screen..
- Android O adaptive icon support
- fixes in wallpaper filtering

Version 7.5 released on July 27, 2017

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App Description

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!

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

- 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)

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 Screenshots

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Twilight Ranking History | Health & Fitness

Twilight daily app ranking in Health & Fitness category for the last 30 days.

Twilight Worldwide Rankings | Health & Fitness

Twilight rankings per country in Health & Fitness category.

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