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Twilight APK

Twilight APK

Views: 269
Rated 4.6 stars out of five star
302,591 Total

  • Required Android: Varies with device
  • Installs: 5,000,000 - 10,000,000
  • Published/Updated Date: December 15, 2017

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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
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)
http://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, 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.

User Reviews
4.6

302,591 Total
5 219,853 
4 56,763 
3 15,245 
2 4,650 
1 6,080 
 Alexandra Overwick
Alexandra Overwick
January 22, 2018

Not even 2 days into it and already can sleep easliy. I usually have my light on full blast on my phone, and have troubles sleeping. This automatically removes that light based on the time of day and helps me sleep much easier. Heck on the first night of use I had an enjoyable dream which may be a coincidence but Holy. Cow. Awesome sleep. Helped me wake up energized and fall asleep easily. I recommend it. Ye. Full Review

 Olympia Russell
Olympia Russell
February 11, 2018

This app actually does what it says it will do. I've been experiencing a much more restful nights sleep. The only complaint I have, is that the navigation bar on my phone isn't covered. I have a Droid Turbo 2. Other than that, I'm quite happy with this app and I have definitely felt the difference when reading late at night. I have less headaches and wake up feeling more alive than I did perviously. Fantastic app and I recommend it for everyone! Full Review

Unknown
Unknown
March 2, 2018

I love this app and have used it for years. Recently I got a new phone, the Huawei gr3, and now I am having issues. The app dose not stay on once the screen times out. When I unlock my screen, it gets paused and I return to a brightness I was not prepared for. I then have to go and turn it back on. This is really disappointing since this app until now has been flawless and is my most used app on my phone. Reading at night is just not the same without it. Hoping for a fix to this issue in an upcoming update. EDIT: Developer was very helpful and this issue was resolved by accessing my phone settings and changing the lock permission of this app! Full Review

 Tim Hammer
Tim Hammer
December 31, 2017

My phone was making it take longer to fall asleep at night, even on a low brightness. But with using this apps settings of 1000k relaxing, intensity 50%, and screen dim 30%; I've noticed a huge difference. I wish I had started using this sooner! We need sleep, and this app actually helps with that (if you usually use your phone at night) Full Review

 Vipul Sinha
Vipul Sinha
December 27, 2017

Gave it 5 stars BUT there is a major problem.... Screen Sharpness reduces significantly as long as it's on.. I hope devs would look into it.. Sharpness reduction is not much noticeable untill you start any FPS game.. In FPS games you need high sharpness for higher accuracy.. I have to turn it off during any FPS run.. Other games aren't much affected from this.. Full Review

 Nicole Rachelle
Nicole Rachelle
January 27, 2018

This is the best app for screen dimming on Android. You can set a custom schedule if you work a late shift so it won't dim until 2am or 3am. But the one thing that would make it better, to leave the blacks as dark as possible without reducing the contrast by making black kinds of red, is not something any app on Android can do. Not sure why, but it's a disadvantage of the Android platform. Twilight does night mode better than any other app I've found, so it's what I'm sticking with. Full Review

 OffYour Shelf
OffYour Shelf
February 8, 2018

I thought I'd try this out after reading an article about how evil blue light was robbing us of sleep. It's been a few months and I'm sleeping better than ever. Thank you, Twilight! Also, it's neat that it can be set to turn on according to local sunrise/sunset times. Very helpful. Full Review

 Steve Soldwedel
Steve Soldwedel
February 3, 2018

I'm grateful for this app, but since the Android 8 update, it doesn't overlay the notifications on my lock screen, nor on the pull-down menu. As a result, I'm bombarded with blue light. The only way to avoid that is to not look at my lock screen or my pull-down menu, which is nearly impossible. It would be great if the overlay could be fixed to be on top of everything. Full Review

 Sebastian Lüthi
Sebastian Lüthi
February 15, 2018

It does what it promises. Simple and efficient. Would not know what more you could need. I use F.lux on desktop and this app offers you a pretty similar experience. You have to stop it to do some security setings as it interferes with all apps while it's active. Good quicksettings from the top bar. Full Review

 James Dalton
James Dalton
January 22, 2018

This app didn't do anything. My phone screen never changed no matter what I did to the settings. HOWEVER... developer responded to my review with helpful suggestions with which I was able to get the app to work. I wouldn't call this app elegant or easy to use, but I was able to make it function. There's lots of things to tweak and twiddle and fiddle with, which is why I'm not a big fan, however I am currently using it. The eye-saving light is kind of a weird red tone, which I don't like as much as my old phone's amber color. Give it a try. Full Review

 Jacob Moss
Jacob Moss
March 11, 2018

Definitely seems to help me relax before bed. After I started using it I've had an easier time falling asleep. I've been using it for about a year now. Be aware that you can't install Amazon updates while it's running. Just pause it to install, then hit play when it's done. If they fix that, it's definitely a 5 star app. Full Review

 Amber Markwart
Amber Markwart
January 30, 2018

Love the app! Really helps! Also love the notification. Makes it so easy to turn on and off. My only problem is it keeps turning my background on my home screen tinted red. It goes away when I change the image but then it turns red again as soon as the filter is on and stays that way even after it is off. Really hope you can fix this please! Full Review

 Rachel L
Rachel L
February 8, 2018

I've used this for years and loved it, but it's not compatible with my new phone the Pixel 2. It's not dimming my phone screen consistently. It doesn't dim the app icons as well as it does my background. My background will be pitch black at 4AM and the app icons will be almost normally lit - this is especially true of the scroll down menu: bright white. Full Review

 Jamie Cassetta
Jamie Cassetta
December 26, 2017

It's not difficult to use at ALL. Infinite settings: all shades of red, screen dimming, red temperature. Is there a migraine setting? I wish there was so I could wake up, press a button and not have to squint at the bright screen before finding the right setting. I'd give it the five stars for THAT. Full Review

 Britt Stupfel
Britt Stupfel
December 22, 2017

This app is fantastic for getting better sleep. There are a great many features that they developers could charge for, but they don't. It asks for a lot of permissions because of its control over your screen, so you have to have faith the devs aren't data mining anything. Full Review

 Jonathan Ventura
Jonathan Ventura
February 27, 2018

Small and simple app that's easy to use. And it does prevent you from staying awake for too long. There is one problem, though. The filter doesn't cover the home touch buttons on my phone, which could hurt the effectiveness of the app. And some settings (like accessibility settings) could be blocked from turning on while the filter is on. Full Review

 Kylyn Hersack
Kylyn Hersack
December 31, 2017

This app has a lot of features, but the free version is ALWAYS RUNNING in the background. Why do I need to pay for the version that uses good Android practices (i.e. task scheduler) to start and stop automatically (assuming that's what they're doing, of course...)? I'd rather turn it on/off myself, but even then for some reason this app still runs in the background... Also, what are the permissions used for? Other similar apps don't require access to my files. It made me a little nervous downloading your app, especially since it doesn't have ads. Oh, and thanks for the auto-reply! It really reassures me to know that you don't actually read reviews. Full Review

 Marequiz Johnson
Marequiz Johnson
January 19, 2018

I love it!!! Having trouble sleeping and always on my phone. This helps adust my eyes, and it does work to getting you to sleep. I recommend when your screen adjusts, at whatever time you have it set at. To play some music or white noise. It puts me to sleep way faster. Full Review

 Lorinda Wu
Lorinda Wu
January 31, 2018

It used to work great. Downgraded to 3 stars now. Since the current update, it's constantly giving me problems. Random changes in intensity and filtering. Sometimes the filter doesn't work unless I manually open the app. Edit: it's on auto location; the time zone is correct. On custom schedule. Full Review

 Holly M.
Holly M.
January 1, 2018

This app is amazing! It has helped my eyes so much, I love the Bed Reading profile a lot especially. Thanks for such a great app! But unfortunately Google has ruined it with Oreo and not allowing overlays of the status bar/quick settings. Is there a way that a root mode can be added to this app to get around this so at least the folks with rooted devices can take advantage? I hope Google does something about this but I am doubtful they will. Thanks! Full Review

 naruto27emily
naruto27emily
February 5, 2018

I use my phone constantly, I used to get headaches all the time. I heard about this blue light blocker from and friend and it works amazingly! I've been using it for almost 2 years and I have very few headaches now! Thank you guys so much! Full Review

 Elijah
Elijah
February 9, 2018

Fantastic! I've been using Twilight and F.lux (Mobile and PC) for about 4 years. About time I give a review out haha. It's surely allowed me to sleep easier over all of this time. On days where I am not using a device with a Blue pixel dimmer I ALWAYS find it more difficult to sleep. Twilight has been fantastic for me. Full Review

 Ana Mara Munguba Vieira
Ana Mara Munguba Vieira
February 13, 2018

Really good app, aproved by my doctor even. But there is something annoying about it but I couldn't say if the problem is on my phone or the app. Everytime I install a new app it asks me to prevent Twilight from drawing over other apps. I can allow it again later, but it really is annoying. Full Review

Unknown
Unknown
December 23, 2017

Does exactly what it needs to. The persistent notification is annoying but that's an OS problem. I like that you can control it from quick tiles but the only problem is that the tile only pauses the app but doesn't stop it. I paid for the unlock in hopes that the quick tile would stop the app and the notification would go away but it doesn't. You have to manually open the app and stop it. Rather annoying. Especially because I could've done that without paying for it. Full Review

 Tasha Grace
Tasha Grace
February 8, 2018

Not user friendly at all! Keeps turning on at random times, even after I set a custom schedule. Once it turned on so dark I literally couldn't see my screen at all, and I was in the middle of doing something important on my phone. This could be a great app if it was just more user friendly. Full Review

 Allison Ross
Allison Ross
January 26, 2018

I love this app. I emailed Twilight about issues when I updated to Android 8.1.0 and received a thorough and helpful response. Oreo seems to be preventing shading the status bar and notifications but some workarounds were suggested, using Substratum's dark themes and the Andromeda plug-in. Full Review

 Vivek Nair
Vivek Nair
January 3, 2018

Been using it since years now. Helped me to sleep every night. However, ever since I upgraded to Oreo before a while, the notification bar is not getting filtered. Please fix this. I want the whole screen to be filtered like before. The notification bar's brightness is distracting and it sucks to see that small portion in actual brightness. :( Full Review

 Daniel O'Brien
Daniel O'Brien
February 7, 2018

A very good app, very customisable. I used it for 5 years on my Nexus 5, am only now uninstalling it from my pixel 2 because it doesn't work as well, especially with the pull down menu, assume this is a result of updated OS, and I just found an inbuilt function that is very similar in my settings Full Review

 Say Like
Say Like
January 14, 2018

Paid for this, so that when I'm not using it, it would NOT be running in the background, which it always DOES. So incredibly annoying. I'm not filtering my phone, so turn the goddamn app off immediately. This would be handy if it was done via the widget instead of Android telling me to force this stupid app to stop. Complete and utter bs. Full Review

 Julen Clarke
Julen Clarke
March 3, 2018

I love the app, but it makes Android crash sometimes. And even though the developer answered it was a memory leak, I've stopped using Twilight for a week and I stopped having these problems. I'm using another app now and I had no issues so far. Full Review

 Sylvie Lavictoire
Sylvie Lavictoire
January 4, 2018

This app has decreased my eyestrain late at night. When my son was on concussion protocol it also helped him control headaches a little better. Using this app and red LED lights before bed do make me feel calmer before sleep. Many thanks ☺ Full Review

 Regina W
Regina W
January 2, 2018

2018 update: love the home widget! It includes immediate set and pause buttons. OLD: The notification noise is gone! Yea! 5 stars! Love how it dims better than the lowest default on my Galaxy. OLDER: Wish it didn't make noise turning it on and off. Otherwise, great! Full Review

Unknown
Unknown
February 4, 2018

Great app, worth paying a couple extra bucks for transition times and stopping the app during the day. Only thing I really wish it did was apply the filter to the second screen on the LG V series (I have the V10). Full Review

 CK Three
CK Three
March 3, 2018

Mostly like it, except that it's buggy. I'll have the app running and screen will be dim, then suddenly the screen brightens and blinds me (after my eyes have adjusted to staring at a dim screen in the dark). Check settings and the app still shows it playing and should be dimmed. I'd buy the upgraded version if it weren't for this. Full Review

 chamindu Dissanayake
chamindu Dissanayake
February 13, 2018

It was a great job done by Urbandroid team. It is very good for me because I have a habit; chat with my girl friend until late night. After night, wake up on next day I get some pain in my eyes. But after, when I using this app it was taken down (Sorry for my bad English ) Full Review

 name name
name name
January 29, 2018

Was a 5 star app! Android 5.x seems to have issues with it filtering entire screen sometimes. The nav bar usually flashes when u put away keyboard and sometimes never filters nav bar in landscape. On latest version too. Full Review

 Sorry In Advance
Sorry In Advance
January 6, 2018

I got this app around a year ago, and it has made it so much easier to sleep since. There is only one problem in which the app closes down briefly sometimes, which is hard on the eyes after you're used to the filter being on, but other than that it's great! Full Review

Unknown
Unknown
February 26, 2018

This app plain and simple doesn't behave. It randomly makes my screen too dim and wouldn't turn off when I hit "stop." I ended up going through my application settings and I tried to "force stop." Didn't work. So I uninstalled it completely. And now my screen is still this dim red color! What the hell did it do to my phone that the screen is still like this even after being uninstalled???????? I just restarted my phone and nothing changed. I'm incredibly unhappy. Full Review

 nikki grames
nikki grames
March 1, 2018

I turned on the lock and home screen filters and both screens went red. Couldn't get the filters to go away by unchecking the filters in the app. Unistalled the app, screens are still red. Restarted phone completely, still red...TERRIBLE Update-- had to assign new photos to home and lock screens to override what the app did when it was installed. Full Review

 jennaful _
jennaful _
January 22, 2018

I uninstalled the app while it was running in the background. So the filter was applied on my home screen. And now, my home screen is permanently tinted orange! I tried to undo this by reinstalling the app, but it does not recognize that my screen has been altered. Rather, it treats it like a normal screen and applies another layer of filter over the current one. Tldr; don't uninstall the app while the filter is applied. Full Review

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