Natural cycles, biorhythm & bedtime calculator for better sleep, energy & health
About Circadian: Your Natural Rhythm
Circadian: Your Natural Rhythm is a health & fitness app developed by Natural Cycles.
Download Statistics
Circadian: Your Natural Rhythm has been downloaded 180 thousand times. In the last 30 days, the app was downloaded 4.7 thousand times.
User Ratings
Circadian: Your Natural Rhythm is rated 4.11 out of 5 stars. The rating is based on 870 ratings.
App Information
Circadian: Your Natural Rhythm is FREE to download. The APK download size is 53.71 MB. The latest version available is 7.3.2. The last update was on April 8, 2026.
Technical Requirements
Circadian: Your Natural Rhythm requires Android 5.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play October 2020.
Description
🌟 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.
Recent changes: This version includes various minor improvements and bug fixes.
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Comments on Circadian: Your Natural Rhythm for Android
★★★★★Jacob Heringman· Nov 16, 2024
An ideal circadian guide, everything I could possibly want to help me with sunrise/set, UVA, UVB, and much more!
★★★★★Mélanie B· Feb 28, 2026
100% recommend. Great app with all the needed info for living life with the circadian rhythm. So appreciated that it is free, love the timers to remind of the sunset etc. especially on cloudy days. Also, a big plus the great and personal support, quick and very helpful replies.
★★★★★Merritt DuPree· Sep 30, 2025
This app helps me optimize my day and get synced with the circadian rhythm wherever I am. I definitely recommend. Over time, I have used the alarms less. I don't need one to wake up anymore, yay! There are quite a few tech bugs. The app has randomly reset itself a few times and all of my alarms and settings have to be redone. Sometimes alarms go off randomly without me having turned them on, or they'll go off at the completely wrong time.
★★☆☆☆Jeroen Doesburg· Mar 30, 2025
The app does not take DST into account in my location (Europe). All times are one hour off as of this morning 🙈. Glad I didn't claim the various xx % off offers for an app that doesn't get something basic like this right. My Circadian (which has a very cluttered interface unfortunately) does get the times and time slots for sunrise, uva, uvb and sunset right, so I'm afraid I'll have to use this for the time being.
★☆☆☆☆PRATEEK KRISHNIA· Mar 19, 2025
Worst app ever seen in my life always stop and circle at the location enter page and does not move forward after adding location in it manually due to their problem of auto location even though after following all correct steps .it has not been opening a single time. I just want to check it after it has come in the newspaper today about its owner and it's benefits, so I thought to check, but it doesn't open only and has proved that the newspaper apps printed are wrong as they never works
★★☆☆☆Santhosh R· Mar 24, 2025
I installed first time. Its taking much time to locate the location. Taking time to buffer. I tried in mobile data and also in Wi-Fi networks. So I exit from this app. Plz fix it. I am curious to know about this app.
★☆☆☆☆Melissa Quinn· Apr 5, 2025
This app has quite a few bugs in the alarm portion of the app. When the alarm goes off to wake you up, and you hit "dismiss" it behaves like a snooze. The thing that caused me to uninstall was when it went off and the screen was completely blank, there was no way to turn the alarm off unless I uninstalled the app.
Google Play Rankings for Circadian: Your Natural Rhythm
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Technologies used by Circadian: Your Natural Rhythm
Circadian: Your Natural Rhythm is requesting 30 permissions and is using 54 libraries.
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