Circadian: Your Natural Rhythm

Circadian: Your Natural Rhythm

Natural cycles, biorhythm & bedtime calculator for better sleep, energy & health

App info


7.0.9
June 28, 2025
Android 5.0+
Everyone
Get Circadian: Your Natural Rhythm for Free on Google Play

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App description


Android App Analysis and Review: Circadian: Your Natural Rhythm, Developed by Natural Cycles. Listed in Health & fitness Category. Current Version Is 7.0.9, Updated On 28/06/2025 . According to users reviews on Google Play: Circadian: Your Natural Rhythm. Achieved Over 124 thousand Installs. Circadian: Your Natural Rhythm Currently Has 790 Reviews, Average Rating 4.2 Stars

🌟 OPTIMIZE YOUR NATURAL CYCLES & BIORHYTHMS TO RISE, SLEEP, THINK, AND EAT AT IDEAL TIMES
Do you ever feel out of sync with your natural cycles? Circadian is the leading circadian rhythm app. By tuning into your circadian rhythm and honoring your biorhythms, you enjoy better sleep, balanced hormones, and a healthier lifestyle.

☀️ ALIGN WITH SUNLIGHT & SEASONS
Why dissect every sleep cycle or follow a fixed sleep calendar when natural cycles guide you best? This circadian rhythm app harnesses diurnal patterns—risen dawn, UVA/UVB rise & set, solar noon, sunset, and darkness—to set consistent rise & sleep reminders and wind-down alerts. Trust your internal clock to help you establish a smooth sleep rhythm and a natural circadian sleep pattern.

🛏️ BEDTIME CALCULATOR & BIORHYTHM CALCULATOR
Plan your optimal hours of sleep and fasting windows with our seasonal bedtime calculator and robust biorhythm calculator. Swap rigid schedules for nature’s timing: anchor bedtime to dusk and wake with rise sun. Our bedtime calculator uses your rise time and the optimal seasonal sleep duration to calculate your bedtime. Studies confirm syncing with natural cycles outperforms any sleep cycle tracker. Let the natural cycles guide you to entrain your biorhythm with optimal reminders for better sleep, meal, work & exercise times.

🍴 EAT & FAST IN SYNC WITH NATURE
Intermittent fasting and time-restricted eating work best when aligned to daylight. Front-load calories at sunrise and close your eating window by dusk to match your circadian rhythm. Research shows skipping breakfast or dining late disrupts this rhythm and harms metabolic health. With Circadian, set eating & fasting reminders that honor this timing for balanced blood sugar and deeper sleep.

🧬 THE SCIENCE OF CIRCADIAN RHYTHMS
Built on Nobel Prize–winning chronobiology, this circadian app explains how your internal clock and biorhythms regulate melatonin, cortisol, and vitamin D production. Getting the right circadian cues—light/darkness, food & exercise—at the right time is non-negotiable for a healthy body, mind, and heart. Use Circadian and its extensive learn & research section for tons of actionable insights on your sleep rhythm, artificial light, exercise timing, diurnal living and much more to transform your natural life.

🌅 YOUR NATURAL ALARM CLOCK
Wake gently with circadian rhythm alarm clock features: rise with the sun to greet the day. Getting natural light into your eyes for 5 minutes upon waking improves your sleep quality the next night by 20 %! Make rise sleep, rise sun, solar-noon check-ins, and sunset wind-downs part of your day. Let the surrounding natural life be your health clock tuning your biorhythms.

☘️ ENJOY TRUE RHYTHM & HEALTHY LIVING
As a top choice among health and wellness apps, Circadian focuses on pure nature-driven guidance—no complicated integrations. Enjoy better sleep and harmonious days shaped by your true rhythm.

🗝️ KEY ASPECTS
• Natural cycles: dawn, sunrise, UVA/UVB rise & set, solar noon, sunset, and dusk
• Bedtime calculator & biorhythm calculator: optimize your hours of sleep across the seasons
• Circadian rhythm alarm & health clock: custom alerts for medication, rise sleep, and much more
• Intermittent fasting in sync with nature: set your eating window to nature’s timing for better sleep, metabolism, and health
• Diurnal guidance: honor your true sleep rhythm—not a static sleep calendar or dissect every sleep cycle
• Core circadian library: 20+ deep-dive articles on melatonin, sunlight, menstrual cycles, grounding, and diurnal living science
• Embrace circadian sleep, vibrant energy, and a rhythm set by nature

Ready to unlock better sleep, balanced energy, and happier days?
Download Circadian: Your Natural Rhythm now — your ultimate circadian app and biorhythm calculator for natural cycles and optimal living.
We are currently offering version 7.0.9. This is our latest, most optimized version. It is suitable for many different devices. Free download directly apk from the Google Play Store or other versions we're hosting. Moreover, you can download without registration and no login required.

We have more than 2000+ available devices for Samsung, Xiaomi, Huawei, Oppo, Vivo, Motorola, LG, Google, OnePlus, Sony, Tablet ... with so many options, it’s easy for you to choose games or software that fit your device.

It can come in handy if there are any country restrictions or any restrictions from the side of your device on the Google App Store.

What's New


This version addresses some scroll issues and adds fixes for Xiaomi devices.

We're actively working to improve Circadian.
Feel free to contact us at [email protected] if you have any issues, feedback, suggestions, or questions.

Mind your rhythm, mind your light ☀️
Team Circadian

Rate and review on Google Play store


4.2
790 total
5 68.0
4 10.7
3 5.6
2 3.9
1 11.9

Total number of ratings

Total number of active users rated for: Circadian: Your Natural Rhythm

Total number of installs (*estimated)

Estimation of total number of installs on Google Play, Approximated from number of ratings and install bounds achieved on Google Play.

Recent Comments

user
HC Craig

I'm a huge nature-lover, and believe that many of our health problems come from living out-of-synch with nature. This app is perfect for me. It tells me when the sun is up, so that I can rise with this sun, making the best use of our naturally-occurring light. It reminds me to leave my work-desk and get some sunlight, as well as to stretch my legs a little. I'm a workaholic and can get too deep into my work, then realize after 3 hours that I haven't really moved at all. Not good for my health. This app also reminds me to quit eating and thus brush my teeth a few hours before I go to bed. This has helped my stomach problems. I never thought about the late-night snacking doing damage to my GI tract. If you are experiencing problems opening this app, make sure that Google Play Store is enabled. I keep it disabled. I keep the auto-location off, but entered my location by hand. That works fine in the app. There are some good articles in there for you to peruse that give you insight into how nature affects our health. Customer service in this team are fantastic!

user
Mary Sokolowski

I have been using the app for about 6 months and it has been great. It doesn't seem that the app for daylight savings time. Now my sunrise, uva rise and nightfall are all off an hour. It's frustrating because now the timers are not correct and I have to keep track of it myself.

user
Paul and Diana Johnson

I love this app. It has been ever so helpful and informative since I started the circadian journey in the fall. I really appreciate the bite-sized bits of information as well as the longer reads. The product recommendations have also been very helpful. Love the bird sound for the notifications, too!

user
Andrew Elpers

Fantastic app! Knowing when UVA and UVB starts and ends is my favorite to help with hormone optimization since I get caught up in the day when at work. Also, tech support was super quick to respond with an issue. Great experience all around.

user
Catherine York

the app won't let me enter my location and it can't detect my location and it has permission, so unfortunately I can't even get to try the app. I've un-installed and re installed hasn't helped.

user
Keith Nadolny

It never works correctly from day one. I do not want this app because it is not functioning correctly. I want to cancel. To be honest, I want my money back but can find a way to cancel. I DO NOT WANT THIS APP TO AUTOMATICALLY CHARGE ME. Not a fan of this app.

user
Alistair Marshall

The app has been great overall (I'm using the free version), and it's very handy for checking sunrise and sunset times. However, since the recent updates, I haven't been receiving push notifications even though they are enabled. I hope this issue can be resolved soon, as it's quite inconvenient.

user
Amy Miller

The app has great educational content and health articles. The notifications and alarms are also helpful. I travel full time so I have to update when I go to a new time zone manually. Otherwise, the notifications are off. Great app for helping get into a better flow with your circadian rhythms and education on the whys behind it.