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Twilight: Blue light filter

Urbandroid (Petr Nálevka)
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4.6 (420649 评论)
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Description of Twilight: Blue light filter

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/

Wear OS

Twilight also syncs your Wear OS screen with your phone's filter settings. You can control filtering from a "Wear OS Tile".

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

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这些评论和分数来自于谷歌商店用户.

4.6

420649 评论
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Walker Shave
I have blue light sensitivity and this app makes it possible for me to use my phone without getting sick. I have it on almost all the time. I love the screen dimming feature, which lets me get the screen even darker than my phone would usually allow. (This way I can read in the dark.) Works reliably and consistently. I wouldn't change anything. Thanks for making this app!
A Google user
On the whole, I really like this app. It's been invaluable for being able to dim my screen enough that I can read comfortably in bed at night. My one complaint is that it somehow managed to break my phone's wallpaper, turning it a permanent very dark red shade that did not go away even when I uninstalled the app. Resetting the wallpaper ultimately fixed it, it was just kind of irritating trying to figure out how to fix it at the time.
Haley Criswell
This app is so helpful. It has a bunch of options for the filter settings. It also has settings for when you want the filter to turn on, either gradually as time to sleep gets closer, or at a preset time. The app is also easy to navigate and settings are very easy to alter. However, one issue I've found when using the app is that I cannot install apps from the Google play store. To download anything I have to turn off Twilight, press install, then turn it back on. This is why I gave 4 stars.
Dana Urrey
Best filter app, works much better than the built in for sure. Easy to set and doesn't seem to drain the battery anymore than a typical utility app, or at least that's been the case on my KYOCERA duraforce pro2. I feel the difference it has on my eyes which strain when I look at a bright screen in the dark, but they feel much better with twilight running. The built-in filter doesn't filter enough to feel any difference. Update, two years later and I still love this!
M. Torres
Great app, and great customer support who immediately recognized my issue with the floating icon. Thank you so much! App is fantastic at the free version, enhanced features for the pro version. I've noticed my eyes feel heavier earlier in the day. I'm sure it's because of the reduced blue lighting, but I'm unsure whether this is a normal biological reaction or if it's healthy/safe. I've even reduced blue light on my television and I feel sleepier earlier in the day.
Flora Franklin
Love this app. I use it every night and sometimes during the day if I need to calm before a nap. It doesn't always work over apps, though it's getting better, and it crashes approximately once every three months or so (normal for apps), which wouldn't be a huge deal except the screen is blinding when that happens. Overall an essential part of my daily phone use!
A Google user
Great light filtering app! It's easy to use, has a great adjustable screen darkening mode as well as the blue light filtering function that makes it so much easier on the eyes in the dark or before bed. I use my phone right up until I'm ready to go to sleep, and with this app, I can still call asleep after I turn it off for the night. Worth it to upgrade to Pro as well.
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 😅
A Google user
I try to change the intensity or screen dim settings, and it doesn't do anything. extremely laggy, and it won't let me press the pause button. ended up crashing on me. keeps trying to open again the I get a pop up that twilight isn't responding. ruins my wallpaper everytime I turn off my phone for a while. I just want a working filter like c'mon. edit: I did figure it out, I just had to erase all the excess cache on my phone. then it worked great. good app too.
A Google user
I used to really love this app but recently it seems to only be able to overlay on the background and not over home screen or menu buttons. It also no longer overlays on any open app. My guess is it has more to do with what Samsung let's them access, but it definitely sucks. This was one of the small things I would use to mitigate migraines. I hope it gets restored to full functionality soon.
Krissy Leehane
Finally, a screen dimming app that consistently works! I don't need quite as many settings as this one provides... But it is missing one setting that would be helpful: I would like to be able to schedule Twilight based on my connection/disconnection to specific Wi-Fi or Bluetooth devices. Mainly this is so that when I am walking outdoors, or driving in my car, Twilight will turn off automatically.
A Google user
i felt immediate relief after turning this app on and I keep it on all the time. However, I feel this app could be improved greatly, hence the three stars. this app red shifts all colors on the screen. This is a good thing that I got used to quite easily. The problem comes with the extremes of white and black. Black is heavily shifted towards red or yellow depending on the color tempature setting, while the white is left almost unaffected. I feel it should instead be the other way around.
A Google user
for the most part this app works well and it helps my eyes. I like the color it uses and the gradual build it uses better the that of similar apps I have tried. It doesn't have pop-up ads. But it still has some bugs. It sometimes gets stuck on after it should be off, or effects the background but not any of the thumbnails/ widgets. I sometimes have to restart the app to get it going again.
Kurson Ramkeesoon
The app runs like clockwork, literally. I have it set to activate at sunset until 6am, and it does its thing every day with no issues. It also has the opposite feature/option to help you stay awake by applying a blue tint, which I have set from 6am to sunset. As a result, the last 3-5 months or so, I've maintained a PERFECT sleep schedule. I go to bed around 9 to 11pm, and wake up at 7am. Although it is anecdotal data, I will state that it's the longest I've held this schedule, ever. 👍
A Google user
I have only had Twilight for a week and it has made my phone screen a lot more bareable to look at (I have chronic migraines and am light sensitive). I also noticed that I've been able to fall asleep faster without all the blue light exposure - I'm guilty of browsing the net in bed and Twilight still made a difference. Sadly, it does not work consistently on my phone (Android 6.0.1) and it randomly changes from red to off. If it worked as intended, it would have gotten 5 stars from me.
Melinda Kucsera
The app is great when it works, but OMG it's so glitchy. The brightness changes every time I unlock my phone. I don't understand why it can't stay at whatever I set it. Also the percentage of the filter it applies kept changing too every time I unlocked the screen. The two settings don't stick. It's very annoying. But I like the red filter better than the app I was using before, so I'm going to keep using this because it's much easier on the eyes. Please make the settings stick.
A Google user
I've enjoyed the app. It does what it says, has clean interface, and it's easy to use. Unfortunately, I've been having issues of it changing my wallpapers every time the app stops. I contacted support multiple times to no avail. I'm also annoyed that when I get a new phone I have to set up everything again as there is no backup feature. I've been requesting this for awhile and don't understand why GDrive or Dropbox backup can't be implemented. Lack of support is why I'll try out other apps.
Steven Williams
No Glitches, Works Good. Best one I've used. All the other top blue light filters were glitchy, causing performance problems on my phone, like switching between on and off. Twilight Blue light Filter stays on and doesn't mess with my phone's operation. I have it set to stay on always, but you can configure it to come on only at certain hours. This is the one for me. I recommend it.

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此应用程序通过了病毒、恶意软件和其他恶意攻击的安全测试，不包含任何威胁.

Twilight: Blue light filter - APK 信息

最新版本:
包名: com.urbandroid.lux
安卓兼容性:
开发者: Urbandroid (Petr Nálevka)
隐私政策: https://team.urbandroid.org/privacy/
名称: Twilight: Blue light filter
大小:
下载量: 10M
版本:
发布日期:
包名: com.urbandroid.lux
开发者: Urbandroid (Petr Nálevka)