Twilight
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Twilight AI Editor's Review
Twilight is a blue light filter app designed to improve sleep quality by adapting your screen's color to the time of day. It reduces eye strain and helps regulate your circadian rhythm for better sleep.
Comprehensive Analysis
Twilight is a simple and effective solution for mitigating the effects of blue light emitted from screens, particularly at night. The app automatically adjusts your screen's color temperature based on the time of day, reducing blue light exposure and promoting melatonin production. Users can customize the color temperature and intensity to suit their preferences. While the color shift may initially feel unusual, the app helps users fall asleep more easily and experience improved sleep quality. Occasional manual adjustments may be needed for optimal performance.
Key Advantages
- Effective blue light filtering reduces eye strain
- Customizable settings allow for personalized color temperature adjustment
- Automatic mode adjusts screen color based on sunrise and sunset times
Areas for Improvement
- Can slightly distort screen colors, affecting visual accuracy
- May require manual adjustment for optimal performance in certain lighting conditions
The description of Twilight
Site Editorial Commentary：Filters blue light from your screen, reduces eye strain and helps you sleep
Are you struggling to fall asleep? Do your children become overly active when using tablets before bedtime?Are you using your smartphone or tablet late in the evening? Are you sensitive to light, especially during migraines?
Twilight offers a potential solution!
Recent research indicates that exposure to blue light before sleep can disrupt your natural circadian rhythm, leading to difficulty falling asleep. Twilight helps address this issue by filtering blue light.
The key is the photoreceptor in your eyes called Melanopsin. This receptor is highly sensitive to a narrow band of blue light in the 460-480nm range, which can suppress the production of Melatonin – a crucial hormone that regulates your healthy sleep-wake cycles.
Scientific studies have shown that individuals who read on a tablet or smartphone for a few hours before bedtime may experience a delay in their sleep onset by approximately one hour. Refer to the research references below for more details.
The Twilight app intelligently adapts your device's screen to the time of day. After sunset, it filters the blue light emitted by your phone or tablet, protecting your eyes with a gentle and soothing red filter. The filter intensity is smoothly adjusted based on your local sunset and sunrise times, aligning with the natural sun cycle.
You can also seamlessly use Twilight on your Wear OS device for consistent eye protection across devices.
Documentation:
http://twilight.urbandroid.org/doc/
Enhance your Twilight experience:
1) Bedtime reading: Twilight provides a more comfortable reading experience at night. It can lower the screen backlight far beyond the standard backlight controls on your device.
2) AMOLED Screens: We've rigorously tested Twilight on AMOLED screens for 5 years without observing any burn-in or depletion. When properly configured, Twilight reduces light emission (through dimming) and promotes more even light distribution (dark areas like the status bar are tinted). This may actually extend the lifespan of your AMOLED screen.
Learn more about circadian rhythm and melatonin's role:
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 Explained:
- Location: Required to determine your local sunset/sunrise times for accurate filter adjustment.
- running Apps: Used to disable Twilight in specific apps when needed.
- Write Settings: Necessary to adjust the screen backlight.
- Network: Allows access to smart lights (Philips HUE) to coordinate blue light filtering throughout your home.
Accessibility Service:
To effectively filter your notifications and lock screen, Twilight may request you to enable the Accessibility Service. This service is solely used to improve screen filtering and does not collect any personal information. For more information, please visit https://twilight.urbandroid.org/is-twilights-accessibility-service-a-thread-to-my-privacy/
Wear OS Integration:
Twilight synchronizes your Wear OS screen with your phone's filter settings. Control filtering directly from a dedicated "Wear OS Tile".
Automation (Tasker and others):
https://sites.google.com/site/twilight4android/automation
Relevant 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
What's New
Twilight v12.11 Update
- Fix for pausing times larger than 1 minute - Several warnings and guidance on recent Play Store secured buttons
Twilight Appreciation Progress
10000000 / 5,000,000,000 likes
2% completed
Additional Information
Installs
Requires Android
Android 6.0+
Content Rating
12+ Everyone
Privacy Policy
View details
Available on
Google Play
