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Android Apps > Health & Fitness > Solar Circadian Clock
App profile · Health & Fitness
Solar Circadian Clock icon

Solar Circadian Clock

by Damien Devillian · Free · Version 11.12.000

“Resync your body & mind to its circadian rhythm” the developer's tagline

Availability No longer on Google Play
Rating on Google Play
–
Rating
–
0 reviews
Total installs
3.8
thousand
Best rank
–
not in the top lists
Last updated
April 4, 2025
11.12.000
AppBrain's verdict Niche

Solar Circadian Clock is a niche app, with 3.8 thousand installs. It doesn't have enough ratings yet to judge what users think.

Solar Circadian Clock is made and published by Damien Devillian. AppBrain is an independent app data site and isn't affiliated with Damien Devillian. The app name, icon, screenshots and description belong to Damien Devillian and are shown as published on Google Play.

About Solar Circadian Clock

“Resync your body & mind to its circadian rhythm”

Damien Devillian, on Google Play

Solar Circadian Clock was a health & fitness app developed by Damien Devillian. It was removed from Google Play May 26, 2026.

Install Statistics

Solar Circadian Clock had been installed 3.8 thousand times before it became unavailable.

User Ratings

The app had no ratings.

App Information

Solar Circadian Clock was free. The app size was 27.73 MB. The last available version was 11.12.000. The last update was on April 4, 2025.

Technical Requirements

Solar Circadian Clock required Android 4.4+ or higher. The app had a content rating of Everyone. The app had been available on Google Play since October 2022.

Description by Damien Devillian (from Google Play)
Solar Circadian Clock, is an app that helps you to resync your body and mind, to it's natural rhythm.

From an evolutionary point, our natural rhythm, is around the day/night cycle, which is determined by the solar cycle.
We didn't use clocks to tell time, and we didn't have lights at night.
Everything we did, was focussed around the sun, including our sleep & wake cycle, hormones and metabolism.

This app uses your GPS Position, to calculate the Solar Times, and the circadian rhythm of your body for each day.

Sunlight & Daylight
The app shows you the progress of the Sun, through the Solar Day, also highlighting the Meal & Sleep Timings.
It includes data on the Sunlight & Daylight Duration, with an active counter.
It also compares the length to the day before and day after, which shows if the Solar Days are getting longer or shorter.

Solar Timings
The app shows the following Solar Times for your GPS Position:
1) Solar Midnight (Start of Day)
2) Twilight Start
3) Sunrise
4) Solar Noon
5) Sunset
6) Twilight End
7) Solar Midnight (End of Day)

Circadian Timings
The app shows the following Circadian Times for your GPS Position:
1) Rise in Blood Pressure
2) Melatonin Secretion Stops
3) Bowel Movement Likely
4) Highest Testosterone Secretion
5) High Alertness
6) Best Coordination
7) Fastest Reaction Time
8) Greatest Cardiovascular & Muscle Strength
9) Highest Blood Pressure
10) Highest Body Temperature
11) Melatonin Secretion Starts
12) Bowel Movement Suppressed

Meal Timings
The app shows you the following meal times, based on your Circadian Rhythm and Natural Metabolism:
1) Breakfast
2) Lunch
3) Dinner

Sleep Timings
The app shows you the following Sleep Times, based on your Circadian Rhythm and Sleep Cycles:
1) Optimal Time to Wake Up
2) Optimal Time to Sleep
3) "NREM 1" Stage
4) "NREM 2" Stage
5) "NREM 3" Stage
6) "REM" Stage

The use of Sleep Cycles, allow you to plan your ideal sleep timings to maximise your rest.
Each Sleep Cycle, is further divided to show you the following timings:
Healthy Wake Timings - These are the best times to wake up, with or without an alarm clock.
Natural Wake Timings - These are the times you will be going through REM stage, and should only wake up naturally, without an alarm clock.
Studies have shown that forcing yourself to wake up during these timings, can lead to a negative mood for the day.
Unhealthy Wake Timings - These are the times when you are in your Deepest Sleep.
Waking up during these times, causes "Sleep Inertia", which causes you to have slower thinking and reaction.

Solar/Circadian Event Information
For every Solar & Circadian event, you get the following:
Custom Event - Where you can create your own linked event. For Example, you can add "Go to Gym", 30 Minutes before the Highest Testosterone event.
Notification - Where you can choose to be notified when it's time for the event.
Favourite - Where you can make the event to be shown more obviously.
Multi-Day Timing - Where you can see the event time for the day before, and next few days, to know if it's getting earlier or later.
You can add them to your device alarm clock or calendar.

Home Screen Widget
You can add a widget to your device's home screen, which will show a list of all the upcoming Solar & Circadian events.

Other Dates
You can also search for the Solar & Circadian Information, for your GPS Location, but for another date.
This is ideal when you are planning for a future event. For example, if you are organising a "Sunrise Yoga" event for the weekend.

Other Cities
You can also search for the Solar & Circadian Information, for other cities.
While this lacks the accuracy of using your GPS, it is ideal if you are planning a trip, and wish to plan an event.
Show more Show less
Price Free
Total installs 3.8 thousand
Rating No ratings
Version 11.12.000
App size 27.7 MB
Number of libraries 12
Designed for Android 4.4+
Suitable for Everyone
Ads Contains ads

App Performance Report

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This app is currently not available on Google Play.

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Screenshots

Screenshots of this removed app
We kept the screenshots from before it was removed. Subscribe to see them.

Also available on the App Store

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Installs over time

Installs over time
Subscribe to see install velocity and history

Solar Circadian Clock has been installed 3.8 thousand times.

Changelog of Solar Circadian Clock

Show changelog

Developer information for Damien Devillian

Damien Devillian

Website

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Address:

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Comments on Solar Circadian Clock for Android

★★★★☆ S T · Feb 16, 2024
I like this application, finding it useful. Thank you developer/s. Could you explain the methodology and reasoning for how the app determines times for circadian events and activities, other than sunrise/set, noon and so on?
★★★★★ Will Lotto · Dec 11, 2024
This is a very comprehensive circadian rhythm app. It's actually really good. The ads are terrible, but it's only $5 or so to get rid of them which is a lot cheaper than a lot of the other similar apps. I find it crashes a bit on startup but the Devs seem very helpful, so I'm working with them directly. It does load up and run like a dream if you simply re-open the app.
★★★★★ Phillip Rogers · Nov 3, 2023
This app is really on the dot and the unlock price is reasonable! I love chronobiology and this is where it needs to be!

Technologies used by Solar Circadian Clock

34 permissions · 12 libraries
Subscribe to see full permission and library details

Frequently asked questions about Solar Circadian Clock

Is Solar Circadian Clock free?

Yes. Solar Circadian Clock is free on Google Play.

Is Solar Circadian Clock still available?

No. Solar Circadian Clock was removed from Google Play. We last saw it there May 26, 2026.

Does Solar Circadian Clock contain ads?

Yes. Google Play lists Solar Circadian Clock as containing ads.

What Android version does Solar Circadian Clock require?

Solar Circadian Clock runs on Android 4.4 and higher.

How large is Solar Circadian Clock?

Solar Circadian Clock is 27.73 MB.

Is Solar Circadian Clock suitable for children?

Google Play rates the content of Solar Circadian Clock as suitable for everyone.

How many times has Solar Circadian Clock been installed?

Google Play lists 1,000+ installs for Solar Circadian Clock.

Who made Solar Circadian Clock?

Solar Circadian Clock was developed by Damien Devillian. It is listed in the health & fitness category on Google Play.

What are the best alternatives to Solar Circadian Clock?

People looking at Solar Circadian Clock also look at these health & fitness apps: Circadian: Your Natural Rhythm, Sun & Moon Calendar, Sun Seeker: Sunlight Tracker, Solar Time Pro, Sunday・Sunrise Sunset Times.

Popular Health & Fitness Apps Price drops on Google Play Today's trending apps Top new apps Apps other people are watching
Circadian: Your Natural Rhythm icon Circadian: Your Natural Rhythm
Sun & Moon Calendar icon Sun & Moon Calendar
Sun Seeker: Sunlight Tracker icon Sun Seeker: Sunlight Tracker
Solar Time Pro icon Solar Time Pro
Sunday・Sunrise Sunset Times icon Sunday・Sunrise Sunset Times
nbWatch: Solar Graph icon nbWatch: Solar Graph
Basic Digital Watch Face icon Basic Digital Watch Face
Solar Clock icon Solar Clock
Overview History Reviews Technology
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