Twilight: Blue light filter APK

Version 12.17 - com.urbandroid.lux

Twilight: Blue light filter apk

APP Information

Download Version 12.17 (476)
Apk Size6.78 MB
App DeveloperUrbandroid (Petr Nálevka)
Malware CheckTRUSTED
Install on Android4.1.x and up
App Packagecom.urbandroid.lux.apk

Download Twilight: Blue light filter 12.17 APK

App Description

Twilight: Blue light filter is urbandroid,health,fitness,twilight:,blue,light,filter, content rating is Everyone (PEGI-3). This app is rated 4.73 by 77 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 12.17 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 112147+ 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
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 
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

  • - Fix for a regression - the quick setting dialog not being filtered
  • - Better Stop option on Android TV

App Screens

Twilight: Blue light filter App Screen 1Twilight: Blue light filter App Screen 2Twilight: Blue light filter App Screen 3Twilight: Blue light filter App Screen 4Twilight: Blue light filter App Screen 5Twilight: Blue light filter App Screen 6Twilight: Blue light filter App Screen 7Twilight: Blue light filter App Screen 8Twilight: Blue light filter App Screen 9Twilight: Blue light filter App Screen 10Twilight: Blue light filter App Screen 11

Older Versions

More Android Apps to Consider

Google Play Reviews

  1. Melissa Megoulloa-avatar

    Melissa Megoulloa

    Love it! You can switch between an automatic schedule or one that correlates with actual sunrise and sunset. If you allow notifications in the status bar then you can easily go in and temporarily remove the filter. I forget that is even on sometimes. Don't forget to turn it off when you take screenshots or you're not going to be able to see anything in the regular daylight from it 😅

  2. Corina Johnson-avatar

    Corina Johnson

    This app is easy to use. Like that you can manually customize the the Colors on your screen so you do not get that harmful blue light anymore. Also like the fact there's no annoying voice ads to sit through just to adjust your phone. I have deleted so many other apps because of that this one I've had for a couple years & never gave me problems.. I definitely recommend! 😀

  3. Anton Paarup-avatar

    Anton Paarup

    Great app to reduce blue light from your phone. I've used it for about a year, and I'm very satisfied with it. It reduces the blue light by adding a orange filter to everything, which makes it easier to go to sleep after using your phone. And it can lower the screen light level even more than possible in your settings.

  4. Charles Touhey-avatar

    Charles Touhey

    I like twilight, but when its running it messes with other apps and basic phone functionality for example in order to leave this review I had to disable twilight because it breaks the play store. Also it asks for a lot of accessibility permissions. I'm no expert and haven't taken a deep look at how this handled but I don't want twilight as the middleman between me and every interaction I have with my phone

  5. JOHN AMPUAN-avatar


    Its great a app but I hate it when I'm switching between apps, opening apps or just tapping the recents app button because it suddenly pauses the filter in seconds and then resume again it hurts my eyes and the brightness of my screen is 30% to 40% and that's painful specially at night and your just looking at your screen and then switch to other app and then suddenly surprises you with a bright screen (EDIT) i found out that it happens when in landscape mode i hope will be fixed soon

  6. Kindiz-avatar


    This app is amazing! I've been using it for a year or two now, and as I do some reading before going to sleep, I've been affected by the sharp light of my screen. But after I installed this app and adjusted the settings to my liking, I fall asleep a lot quicker, and it doesn't make my eyes water in the dark. Will keep this app for as long as possible. I'd be willing to pay for this app.

  7. Brent Ritchey-avatar

    Brent Ritchey

    A fantastic app that I never want to be without. My only gripe is that I cannot turn on the Accessibility settings to filter notifications without also filtering my Always On Display on my Galaxy S20. This makes the AOD drain my battery, so it's a no-go. Recently the Accessibility setting became necessary to tap Play Store buttons while using Twilight, so now I have to pause Twilight to install apps on my phone. It would be great to be able to selectively turn off filtering of the lock screen.

  8. Dee Fields-avatar

    Dee Fields

    Throw away those blue light filter glasses or if you are looking to buy one, don't. This app is all u need. Been using this for years on dozens of devices from Samsung Galaxy S and A series phones, to Galaxy Tab S2 and S7 and even to an LG TV. It's flexibility and features are great. I've used others a few years ago but came back to this one. It's the best IMHO

  9. Wildgrass Gill-avatar

    Wildgrass Gill

    My vision has been damaged by having no choice, but to use screen devices. I have noticed improved vision when reading with Twilight. There is greater clarity (!) & less fatigue. Very special thanks to the developers who have made this assessible to us.

  10. T Tee-avatar

    T Tee

    Doesn't work for front screen z flip 3. Every time the app changes the front screen on my z flip 3 I have to go into the settings and reapply my old wallpaper to remove the red overlay. I've noticed that I've had problems with my wallpaper doing that too and Ive used this app for years. Yes this is a new phone and I have played with the settings. It looks like it needs to be updated to include all newer phones and front screens. Pull down notifications only have overlay 35% of the time.