Twilight: Blue light filter for better sleep APK

Version 12.9 - com.urbandroid.lux
Last updated: Fri, 10 Sep 2021 23:14:21 UTC

Twilight: Blue light filter for better sleep apk

APP Information

Download Version 12.9 (456)
Apk Size6.32 MB
App DeveloperUrbandroid (Petr Nálevka)
Malware CheckTRUSTED
Install on Android4.1.x and up
App Packagecom.urbandroid.lux.apk

Download Twilight: Blue light filter for better sleep 12.9 APK

App Description

Twilight: Blue light filter for better sleep is urbandroid,health,fitness,twilight,🌅,blue,light,filter,better,sleep, content rating is Everyone (PEGI-3). This app is rated 4.74 by 76 users who are using this app. To know more about the company/developer, visit Urbandroid (Petr Nálevka) website who developed it. com.urbandroid.lux.apk apps can be downloaded and installed on Android 4.1.x and higher Android devices. The Latest Version of 12.9 Available for download. Download the app using your favorite browser and click Install to install the application. Please note that we provide both basic and pure APK files and faster download speeds than APK Mirror. This app APK has been downloaded 109701+ times on store. You can also download com.urbandroid.lux APK and run it with the popular Android Emulators.

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. 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.
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
- 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 & 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: Jamie M Zeitzer, Derk-Jan Dijk & Co 2000 

App ChangeLog

  • - Material YOU color shades on surfaces

App Screens

Twilight: Blue light filter for better sleep App Screen 1Twilight: Blue light filter for better sleep App Screen 2Twilight: Blue light filter for better sleep App Screen 3Twilight: Blue light filter for better sleep App Screen 4Twilight: Blue light filter for better sleep App Screen 5Twilight: Blue light filter for better sleep App Screen 6Twilight: Blue light filter for better sleep App Screen 7Twilight: Blue light filter for better sleep App Screen 8Twilight: Blue light filter for better sleep App Screen 9Twilight: Blue light filter for better sleep App Screen 10Twilight: Blue light filter for better sleep App Screen 11Twilight: Blue light filter for better sleep App Screen 12Twilight: Blue light filter for better sleep App Screen 13Twilight: Blue light filter for better sleep App Screen 14Twilight: Blue light filter for better sleep App Screen 15

Older Versions

More Android Apps to Consider

Google Play Reviews

  1. Boogie-avatar


    When charging my phone, the Always On Display (AOD) comes on to display the remaining time left, but the app also causes the screen to glow red and consumes unnecessary battery power, taking longer to charge. Twilight should be disabled until the display can be unlocked. 🔓 Edit 6/28 #1: no because the background is AMOLED | Edit 6/28 #2: Dev said there's already a workaround for this... 'Settings > More > Don't filter ambient screens' works too, so cool! Thank you for your help!! 😎💕

  2. Anjum Madani-avatar

    Anjum Madani

    Pretty good - once you switch it on you can feel the instantaneous relaxing of the eyes. Tweaking settings & creating custom profile is helpful as there can be considerable screen dimming. Works even with Huwaei tablet, a company that Twilight requires special considerations. Worked well also with OnePlus - similar issues for Twilight as Huwaei though less problematic by the sounds of it.

  3. Rhys Pippard-avatar

    Rhys Pippard

    App is unusable from the notification bar. Once enabled, it is impossible to deactivate it, even after killing the app from the Android app info menu. This fundamental bug has not been fixed in months. Now regret paying for this app. Would not recommend. PS: This is even after enabling the accessibility service, which of course was the first thing done before using the app originally.

  4. Yavor Kirov-avatar

    Yavor Kirov

    Does the job with a little random pressing buttons. Settings are hard to understand. Especially schedules and the "always/auto" button - I never understood which state is on and which is off. Tried the "tutorial" - it just makes the screen go dim and the bright again. Buttons for on/off should show their state clearly. Thanks for the app! | Edit: Author has been very helpful. +1star

  5. Ryan Witham-avatar

    Ryan Witham

    The aoo works well dimming the screen, although I don't quite understand the difference between the "screen dim" and "intensity" features. It is designed for Android devics\es, but I use it on my Chromebook and it is better than nothing, even though the features are less user-friendly on the Chromebook.

  6. Helen Ishmurzin-avatar

    Helen Ishmurzin

    *UPDATE - I followed the helpful advice given by customer support in response to my review and it worked perfectly, so I've changed the rating from 3 to 5 stars. Thank you!!* When it works, it works well, but it keeps automatically turning itself off when my screen goes dark, so when I want to use my phone, I have to manually turn Twilight back on (while squinting at a bright screen if I'm in bed in the dark).

  7. Andrea Herrera-avatar

    Andrea Herrera

    I would like it to stop asking for location every single tie I open it. and tk stop shutting off and every so ofte, it messes with my eyes and to stop being kicked off of the permission to stay on top of others. it keeps turning off every 2 minutes, saying I have to give it permissions to accessibility, and its on, and yet it keeps going off.

  8. Tanya T-avatar

    Tanya T

    Bless this app. I can dim or change the tint just right. I look over to my partner's iPhone and even on its lowest brightness its way, way, way, way too bright in a dark room at night. His poor eyes! My only complaint is that I have to pause it fairly frequently because it sometimes conflicts with other apps. I'm not sure that can be helped.

  9. anatasia army-avatar

    anatasia army

    absolutely fantastic, this developer is probably singularly responsible for my sleep health! check out everything they do, sleep as android is fantastic and the one time i had an issue they were SO responsive it made me feel even better about supporting them. this app is my insomnia light-therapy lifesaver.

  10. Arya Mohan-avatar

    Arya Mohan

    I've been using this app for about 2 years. Such a wonderful application. It really helps to reduce eye strain. I've checked out other apps created by the same creator, like the Sleep app and Kinestop. They're also awesome. Thanks for taking effort to create such beneficial applications to make everyone's lives better. I hope everybody appreciates these efforts and spread the word.