Twilight Pro Unlock

Installs

364.4k

Rating

4.7

Rating count

8.8k

Category	Health & Fitness
Developer	Petr Nálevka
Price	13.99
First release	3/5/2013 (12 years ago)
Version	2.2
In-app purchases	No
Contains ads	No
Content rating	All ages
Package name	com.urbandroid.lux.donate

View on Play Store

Core Metrics

Data Breakdown

Date	Rating Count	Average Rating	Installs	Version
5/29/2025	8,773	4.700	364,375	N/A
5/28/2025	8,770	4.700	364,248	N/A
5/27/2025	8,770	4.700	364,237	N/A
5/24/2025	8,770	4.700	364,194	N/A
5/22/2025	8,770	4.700	364,175	N/A
5/21/2025	8,770	4.625	364,142	N/A
5/20/2025	8,769	4.700	364,142	N/A
5/19/2025	8,769	4.700	364,129	N/A
4/28/2025	8,772	4.800	363,823	N/A
4/24/2025	8,773	4.700	363,814	N/A
4/23/2025	8,773	4.813	363,739	N/A
4/22/2025	8,772	4.690	363,607	N/A
4/15/2025	8,772	4.700	363,607	N/A
4/10/2025	8,770	4.700	363,536	N/A
4/6/2025	8,769	4.625	363,473	N/A
4/5/2025	8,768	4.811	363,421	N/A
3/10/2025	8,769	4.811	363,407	N/A
2/27/2025	8,765	4.844	362,961	N/A
2/25/2025	8,765	4.844	362,877	N/A
2/24/2025	8,764	4.844	362,863	N/A
2/20/2025	8,765	4.844	362,845	N/A
2/17/2025	8,761	4.845	362,773	N/A

Details

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 blue spectrum on 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.

PRO features
- more than 2 predefined profiles
- adjustable transition time
- option to turn off Twilight service altogether during inactive times
- new features will often first appear as PRO

Thank you very much for your intention to support our development. This is a pro application for the Twilight app. Please install on top, do not uninstall Twilight first. 

Please read the 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

Examples of 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, Jeanne F. Duffy, Edward J. Silva, Theresa L. Shanahan, Diane B. Boivin, Charles A. Czeisler 2012

    Exposure to Room Light before Bedtime Suppresses Melatonin Onset and Shortens Melatonin Duration in Humans
    Joshua J. Gooley, Kyle Chamberlain, Kurt A. Smith, Sat Bir S. Khalsa, Shantha M. W. Rajaratnam, Eliza Van Reen, Jamie M. Zeitzer, Charles A. Czeisler, Steven W. 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, Richard E. Kronauer, Megan E. Jewett, Charles A. Czeisler 2009

    Intrinsic period and light intensity determine the phase relationship between melatonin and sleep in humans
    Kenneth P. Wright, Claude Gronfier, Jeanne F. Duffy, Charles A. Czeisler 2009

    The Impact of Sleep Timing and Bright Light Exposure on Attentional Impairment during Night Work
    Nayantara Santhi, Daniel Aeschbach, Todd S. Horowitz, Charles A. Czeisler 2008

    Short-Wavelength Light Sensitivity of Circadian, Pupillary, and Visual Awareness in Humans Lacking an Outer Retina
    Farhan H. Zaidi, Joseph T. Hull, Stuart N. Peirson, Katharina Wulff, Daniel Aeschbach & 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, Richard E Kronauer, Emery N Brown, Charles A Czeisler 2000

    Phase-shifting human circadian rhythms: influence of sleep timing, social contact and light exposure
    J F Duffy, R E Kronauer, C A Czeisler 1996

    Exposure to bright light and darkness to treat physiologic maladaptation to night work.
    Czeisler CA..

More Apps byPetr Nálevka

Sleep as Android: Smart alarm

Installs: 23,841,725Score: 4.72Ratings: 382,496

Price: N/A

Version: N/AReleased: 10/24/2010Last change: N/A

Twilight: Blue light filter

Installs: 12,986,392Score: 4.50Ratings: 434,424

Price: N/A

Version: N/AReleased: 3/5/2013Last change: N/A

BabySleep: Whitenoise lullaby

Installs: 5,745,987Score: 4.73Ratings: 74,529

Price: N/A

Version: N/AReleased: 8/13/2013Last change: N/A

Digital Detox: Focus & Live

Installs: 1,409,002Score: 4.67Ratings: 33,548

Price: N/A

Version: N/AReleased: 8/11/2015Last change: N/A

Sleep as Android Unlock

Installs: 1,358,381Score: 4.86Ratings: 38,497

Price: N/A

Version: N/AReleased: 10/28/2010Last change: N/A

KineStop: Car sickness aid

Installs: 760,826Score: 4.91Ratings: 7,281

Price: N/A

Version: N/AReleased: 8/16/2018Last change: N/A

PoKeMoney: Scan,Trade,Eval TCG

Installs: 144,383Score: 4.44Ratings: 312

Price: N/A

Version: N/AReleased: 4/11/2023Last change: N/A

Lullaby pack Sleep + Mindroid

Installs: 124,726Score: 3.86Ratings: 2,964

Price: N/A

Version: N/AReleased: 2/17/2013Last change: N/A

Mindroid PRO Unlock

Installs: 85,262Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 1/12/2013Last change: N/A

Baby Sleep PRO

Installs: 52,983Score: 4.55Ratings: 754

Price: N/A

Version: N/AReleased: 8/13/2013Last change: N/A

PowerLine PRO Unlock

Installs: 22,083Score: 4.59Ratings: 679

Price: N/A

Version: N/AReleased: 6/11/2013Last change: N/A

More Apps inHealth & Fitness

PICKEAT (픽잇) - 건강관리 AI 코칭

Installs: 294Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 11/21/2024Last change: N/A

이젠소프트

Installs: 23,463Score: 3.39Ratings: 18

Price: N/A

Version: N/AReleased: 10/11/2022Last change: N/A

DTBA

Installs: 8,321Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 5/25/2021Last change: N/A

米子市フレイル予防アプリ

Installs: 4,266Score: 2.80Ratings: 10

Price: N/A

Version: N/AReleased: 5/15/2023Last change: N/A

PersonalGO Treinos e Personal

Installs: 26,189Score: 4.75Ratings: 102

Price: N/A

Version: N/AReleased: 8/2/2024Last change: N/A

Personal Fit

Installs: 71,367Score: 4.82Ratings: 3,296

Price: N/A

Version: N/AReleased: 6/10/2020Last change: N/A

Aperta & Solta

Installs: 292,573Score: 4.52Ratings: 7,422

Price: N/A

Version: N/AReleased: 7/2/2021Last change: N/A

Amhemed Saúde

Installs: 15,141Score: 2.92Ratings: 25

Price: N/A

Version: N/AReleased: 3/11/2025Last change: N/A

Endur - Hyrox, HIIT & Skills

Installs: 2,053Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 4/10/2024Last change: N/A

Ágora Pass

Installs: 2,121Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 4/14/2025Last change: N/A

Pocket Breath Coach

Installs: 42,123Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 6/1/2023Last change: N/A

Hello Zeblaze

Installs: 65,346Score: 4.67Ratings: 584

Price: N/A

Version: N/AReleased: 4/16/2022Last change: N/A

Grace: Hypnosis & Meditation

Installs: 19,594Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 9/1/2021Last change: N/A

FoodCalAI - AI Calorie Counter

Installs: 22,870Score: 4.95Ratings: 772

Price: N/A

Version: N/AReleased: 1/16/2025Last change: N/A

Yanta Yoga

Installs: 1,371Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 6/16/2023Last change: N/A

FPT Medicare

Installs: 1,888Score: 4.08Ratings: 25

Price: N/A

Version: N/AReleased: 2/21/2023Last change: N/A

LAXASFIT MAX

Installs: 37,627Score: 4.80Ratings: 85

Price: N/A

Version: N/AReleased: 7/25/2024Last change: N/A

Gain Weight App: Diet Exercise

Installs: 2,147,946Score: 4.76Ratings: 7,838

Price: N/A

Version: N/AReleased: 9/5/2018Last change: N/A

100 Push-Ups Counter & Trainer

Installs: 40,525Score: 2.99Ratings: 275

Price: N/A

Version: N/AReleased: 12/31/2023Last change: N/A

Lenus eHealth

Installs: 122,145Score: 3.64Ratings: 454

Price: N/A

Version: N/AReleased: 1/10/2019Last change: N/A

Lasea® Ruhe-Coach

Installs: 6,145Score: 4.62Ratings: 95

Price: N/A

Version: N/AReleased: 10/18/2022Last change: N/A

myHSA

Installs: 58,729Score: 4.25Ratings: 159

Price: N/A

Version: N/AReleased: 3/30/2016Last change: N/A

Anxiety & Panic Relief: Calmer

Installs: 10,083Score: 4.89Ratings: 161

Price: N/A

Version: N/AReleased: 3/10/2025Last change: N/A

Flexy: Stretch & Flexibility

Installs: 3,104Score: 4.45Ratings: 63

Price: N/A

Version: N/AReleased: 5/14/2025Last change: N/A

dr Ewa Dąbrowska: post i dieta

Installs: 285,579Score: 4.62Ratings: 3,864

Price: N/A

Version: N/AReleased: 12/30/2019Last change: N/A

Brushing

Installs: 185Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 11/9/2022Last change: N/A

AGA・薄毛・抜け毛予防、治療をサポートHIX（ヒックス）

Installs: 5,925Score: 4.76Ratings: 50

Price: N/A

Version: N/AReleased: 12/15/2020Last change: N/A

Drink Now

Installs: 5,308Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 1/26/2025Last change: N/A

Salvum - Premiers Secours

Installs: 42,095Score: 4.15Ratings: 132

Price: N/A

Version: N/AReleased: 4/18/2019Last change: N/A

BMI Quick

Installs: 2,441Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 5/30/2025Last change: N/A

myWOD

Installs: 2Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 4/18/2025Last change: N/A

Leading Edge Admin Mobile

Installs: 8,751Score: 4.65Ratings: 89

Price: N/A

Version: N/AReleased: 4/24/2014Last change: N/A

Sens365

Installs: 69,444Score: 4.30Ratings: 40

Price: N/A

Version: N/AReleased: 7/20/2023Last change: N/A

LinC+ | 건강과 뷰티 솔루션 플랫폼

Installs: 496Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 2/16/2024Last change: N/A

sMiles: Earn Bitcoin

Installs: 69,498Score: 3.41Ratings: 1,708

Price: N/A

Version: N/AReleased: 12/15/2020Last change: N/A

Blood Pressure Plan

Installs: 12,720Score: 0.00Ratings: 0

Price: N/A

Version: N/AReleased: 3/25/2025Last change: N/A

Go back to the Home page