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Circadian: Your Natural Rhythm

Circadian: Your Natural Rhythm

Wellness & health cycles clock

668 ratings
350 reviews
🌟 Lifestyle
💪 Health & Fitness
Free
In-App Purchases

Details

Released
October 5, 2020
Updated
June 14, 2026

Features

Developer

Circadian Limited
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Circadian: Your Natural Rhythm screenshot #10 for iPhone
🧾$47.99 - $79.99
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About

Optimize your daily activities by syncing with natural rhythms. This app helps you wake, eat, move, work, and rest at optimal times for improved energy, clarity, and sleep. It leverages sunlight, seasons, and scientific principles to guide your lifestyle for better health.

✓Sync daily activities to natural rhythms
✓Optimize wake, eat, move, work, and rest times
✓Align with sunlight and seasonal patterns
✓Seasonal sleep and meal timing calculator
✓In-app library on chronobiology and health
✓Set reminders for critical circadian events
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What users say about Circadian

Reviews of Circadian are mostly positive: the Health & Fitness app is rated 4.6/5 from 668 App Store ratings. What users like most: easy to use, informative and educational. Top complaints: crashes and bugs, inaccurate timing and location tracking. Summarized from real user reviews.

Positive things

  • 👍Easy to use
  • 💡Informative and educational
  • 🚀Helpful reminders and notifications
  • 🌞Supports circadian rhythm and natural lifestyle
  • 🤩Excellent customer service

Negative things

  • 🐛Crashes and bugs
  • 🕰️Inaccurate timing and location tracking
  • 💰Expensive subscription model
  • 🤖Rigid and inflexible scheduling
  • 📱Difficult to customize
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What's New in Circadian

4.0.8

June 14, 2026

We improved automated time updates and added various minor fixes. Thank you for your support, Team Circadian

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Subscriptions & In-App Purchases

Monthly Subscription

Monthly Subscription

$2.991 Month
How to cancel Circadian subscription ⁉️

User reviews

Most RecentHighest RatedLowest Rated

It just gets worse and worse

I’ve used this app for years. They’ve changed the monetization structure several times. Old users aren’t grandfathered into the new system. They have to pay again or pay more. I’m stuck using free because I refuse to pay again. But another issue I’ve been having for years is inaccurate times. It used to be an hour off (probably DST messing it up), but now… I don’t even know what’s going on. It says the sun will rise at 4:32am when it’s going to rise at 7:15am. I’ve adopted the concept of this app into my life. I just don’t even reference it anymore since it’s so wildly off.
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SDSmartWater Drinker

Keeps me moving and enjoying the sun!

I absolutely love this app. It does an amazing job of organizing my task reminders, but it's so much more than a planner. It really helps me keep moving throughout the day and acts as a great reminder to step outside and enjoy the sun. It's made a huge difference in my daily rhythm!
Rrhassancr8

Undependable

I wish I could like this app. I love the fact that it has alarms to let you know when it’s sunrise or uvb rise. Unfortunately the alarm only goes off sporadically not daily. Also the sunrise time will not change day to day unless I go into my location, turn off auto locate, then turn it back on
KKjhfdsghn

Not what I expected

Could be more useful maybe I’m not understanding it correctly, but to me it’d be like a checklist if that day I marked off that I had morning son marked off that I got enough. Vitamin D went to bed at what time if we had a checklist then at the end of the week or the end of the month, you then complied
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MMbrown4211

Circadian Is NOT the APP It Used To Be…

After using Circadian for several years I can say my satisfaction has dropped completely. It used to work, now it fails on every use. Having to reset the choices after EVERY TIME it is setup! And the “alarms” fail the same way, EVERY TIME! All the “updates” have destroyed a perfectly good working app. I no longer recommend Circadian for use or purchase.
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DduN36U9
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User experience

🐞

Reported Bugs

4 issues

Alarms not working properly

Bug

Location and timezone issues

Bug

Crashes and freezes during use

Bug

Notifications not updating with changes

Bug
✨

Requested Features

5 requests

Customizable alarms and notifications

Feature

Integration with other health/fitness apps

Feature

Historical data tracking and trends

Feature

Personalized recommendations based on user data

Feature

Widget and Apple Watch support

Feature

FAQ

What does Circadian: Your Natural Rhythm do?

This app helps you align your daily activities, such as waking, eating, moving, working, and resting, with your body's natural rhythms. By syncing with sunlight, seasons, and scientific chronobiology, it aims to improve your energy levels, mental clarity, and sleep quality.

What are the key features of Circadian?

Key features include optimizing your daily schedule based on natural rhythms, aligning your lifestyle with sunlight and seasonal patterns, a seasonal sleep and meal timing calculator, and an in-app library with extensive resources on chronobiology and health. It also allows you to set reminders for important circadian events.

How much does Circadian cost?

The app offers a free starting point with no credit card required, allowing you to try its features. It also has in-app purchases, suggesting that some advanced features or content may require payment.

Who is Circadian for?

This app is designed for individuals who want to enhance their well-being by living more in sync with nature's cycles. It's particularly beneficial for those looking to improve sleep, boost energy, balance mood, and support a healthy metabolism through scientifically-backed lifestyle adjustments.

How does Circadian use scientific principles?

The app is built on Nobel Prize-winning chronobiology, explaining how light, hormones, and the environment influence your well-being. It educates users on the importance of morning sunlight, darkness at night, and robust rhythms for guarding against chronic disease and optimizing health.