Success!
We received your request and we'll contact
you shortly 😊
Twilight: Blue light filter
44
ASO score
Text
25/100
Reviews
100/100
Graphic
58/100
Other
0/100
App Rating
4.5
Votes
44.81M
App Age
12y
Last Update
Oct 20, 2023
Compare with Category Top Apps
|
Metrics
|
Current App
|
Category Top Average
|
Difference
|
|---|---|---|---|
|
Installs
|
12.9M
|
30.3M
|
-58%
|
|
Rating
|
4.54
|
4.51
|
+0.7%
|
|
Number of Ratings (Voted)
|
29.3M
|
32M
|
-8%
|
|
App Age
|
12y 0m
|
6y 10m
|
+75%
|
|
In-app Purchases Price
|
$0
|
$62
|
|
|
Update Frequency
|
510d
|
95d
|
+436%
|
|
Title Length
|
27
|
27
|
|
|
Short Description Length
|
75
|
73
|
+3%
|
|
Description Length
|
3 998
|
3 254
|
+23%
|
|
Number of Screenshots
|
19
|
13
|
+46
%
|
|
Has Video?
|
No
|
0% has videos
|
|
|
Size
|
0MB
|
0MB
|
|
Category Ranking in United States
7 days
Last 7 days
Last 30 days
Last 90 days
Last 180 days
Last year
| Top | Mar 05, 2025 | Mar 12, 2025 |
|---|---|---|
|
No results were found!
|
||
| Top | Mar 05, 2025 | Mar 12, 2025 |
|---|---|---|
|
No results were found!
|
||
| Top | Mar 05, 2025 | Mar 12, 2025 |
|---|---|---|
|
No results were found!
|
||
| Top | Mar 05, 2025 | Mar 12, 2025 |
|---|---|---|
|
No results were found!
|
||
Downloads
Downloads Graph
Total
12.9M
Last month
40.6K
Text ASO
Title
(
Characters:
27
of 50
)
Twilight: Blue light filter
Short Description
(
Characters:
0
of 80
)
Description
(
Characters:
3998
of 4000
)
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}
Read more
Other
Additional Information
| Rating: | |
| Voted: | 44.81M |
| Google Play Link: | |
| Website: | |
| Email: | |
| Privacy Policy: | |
| Categories: | Health & Fitness |
| Size: | - |
| Installs: | 12.86M |
| App Age: | 12 years |
| Release Date: | Mar 05, 2013 |
| Last Update: | Oct 20, 2023 |
| Version: |
Version history
Oct 20, 2023
- Proper Wear OS 3+ support + Wear OS Tile
Varies with device
Jun 30, 2023
- Fix for watch sync with Wear OS 3+<br>- Targeting Android 13 <br>- Not filtered screenshots on all Android versions + better status and navbar coloring
Version history