Download Twilight APK File for Android

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? Are you sensitive to light during migraine?
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. See references below..

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.

You can also use Twilight on your Wear OS device.

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 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

Accessibility Service

In order to filter also your notifications and lock screen the app may ask for enabling Twilight Accessibility Service. The app uses this service only to better filter your screen and does not collect any personal information. Please read more about this at https://twilight.urbandroid.org/is-twilights-accessibility-service-a-thread-to-my-privacy/

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

You are downloading Twilight 13.8 APK file for Android smartphones/tablets which requires Android 7.0 and up. Twilight is one of the best free Health & Fitness apps, you should try it.

To start downloading the APK file of Twilight 13.8 make sure you choose one of the server locations below. After downloading the APK file of Twilight move the downloaded file to your SD card or your Android smartphone's internal memory and then use any Android file manager you prefer to browse & install it.

But make sure you have enabled the third-party app installation to run APK files in Android.

Twilight is one of the best free Health & Fitness apps & you are about to download very latest version of Twilight 13.8. So, to start downloading the APK file of Twilight on your Android smartphone, we provide direct download link below for Twilight 13.8.

Twilight Android apps is the property & trademark from Urbandroid (Petr N?levka) and all rights reserved by Urbandroid (Petr N?levka). You have provided direct downloadable link below to download the original free apk download package.

Please be aware that softstribe.com only share the original and free apk installer package for Twilight 13.8 without any modifications or any alterations within the .apk file package for illegal activities.

If you wish to run Twilight APK for PC, make sure you read the article.

All the apps & games are for home or personal use only. If any apk files download infringes your copyright, please contact us. Twilight is the property and trademark from the developer Urbandroid (Petr N?levka).

Twilight file information

File name: com-urbandroid-lux-13-8_SOFTSTRIBE.apk
Version: 13.8
Uploaded: September 25, 2023
File size: 5.20 MBs
Minimum Android version: Android 7.0 and up

Twilight APK 13.8:

Download APK from secure server >> File size: 5.20 MBs

Get Twilight from Google Play Store