# Circadian: Your Natural Rhythm — Wellness & health cycles clock

> Sync daily life to natural rhythms for enhanced energy, focus, and sleep. (iPhone/iPad app by Circadian Limited.)

- Source: https://appshunter.io/ios/app/circadian-your-natural-rhythm/id1495373007 (this page in markdown: same URL + `.md`)
- Developer: [Circadian Limited](https://appshunter.io/developer/1495373006)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Rating: 4.61/5 from 659 App Store ratings · 345 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.4 · 67 MB
- Languages: English
- Released: 2020-10-05
- Data updated: 2026-08-22
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/circadian-your-natural-rhythm/id1495373007/reviews.md

## What is Circadian?

THE “WHEN” OF YOUR DAILY ACTIVITIES
Feel more energized, think more clearly, and sleep more deeply by syncing your daily life to nature’s rhythm. Circadian helps you wake, eat, move, work, and rest at the optimal times for your body so that you can be at your best.
Achieve natural health by honoring your body’s built-in clock. 

ALIGN WITH SUNLIGHT & SEASONS
Start living more in alignment with your local environment. Circadian harnesses daily and seasonal patterns to optimize your days and thus your health. Uncover sunset, sunrise  UVA/UVB rise & set as important daily markers and time cues. Entrain your body to the time of day, night, and season for a radically different experience of living. 

BEDTIME & BIORHYTHM CALCULATOR
Plan your optimal hours of sleep with our seasonal sleep calculator. Let your sleep cycles sync to nature’s timing and reap the benefits. Understand why just five minutes of morning light can boost next night's sleep quality by 20%. There is a lot to discover. Everything is connected. 

EAT & FAST IN SYNC WITH NATURE
Research shows that intermittent fasting and early time-restricted eating—eating during daylight hours and fasting after dark—support a healthy metabolism, balanced blood sugar levels, and deeper sleep. Schedule meal and fasting reminders that honor nature’s timing.

THE SCIENCE OF CIRCADIAN RHYTHMS
Built on Nobel Prize–winning chronobiology, Circadian reveals how light, hormones, and environment shape your well-being. Learn why morning sunlight is crucial for your mood, energy and hormonal balance, how your body needs darkness at night, and why robust rhythms guard against chronic disease. Explore our in-app library for articles and practical tips on melatonin, exercise timing, artificial light, cognition, grounding, and more.
With over 800 resources and 1000+ references, Circadian is the ultimate guide for learning about the most important aspect of your health.

EVERYDAY BENEFITS
◾ SLEEP WELL – Difficulty falling or staying asleep and excessive sleepiness is often due to chronic circadian disruption. Instead, drift off naturally and wake refreshed.
◾ BALANCE WEIGHT – Circadian disruption is strongly associated with insulin resistance and obesity. Eat and fast in line with nature for an efficient & healthy metabolism.
◾ BOOST ENERGY – Aligning with natural rhythms and increasing exposure to sunlight boosts cellular energy production.
◾LIFT MOOD – Circadian rhythm disruptions and light disturbances are a major hallmark of severe mood disorders. Learn how to produce endorphins, dopamine, and serotonin in your body, naturally.
◾LIVE LONGER – Circadian rhythm disruption plays a direct role in diseases of ageing and ageing itself. The opposite is also true!
◾GET STARTED FOR FREE – Try Circadian for free with no credit card required.

START PRIORITIZING WHAT MATTERS MOST
◾Set reminders for critical circadian events essential for health and vitality.
◾Align your lifestyle with the light and dark cycles at your location.
◾Learn the science of circadian rhythms and how to apply it to your daily life.

Download Circadian today—and step into a more harmonious and healthier life.

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly Subscription | $2.99 | per month |
| Yearly Subscription | $19.99 | per year |
| 33% Off Monthly Subscription | $1.99 | per month |
| 33% Off Yearly Subscription | $12.99 | per year |
| 10% Off Monthly Subscription | $2.49 | per month |
| 10% Off Yearly Subscription | $17.99 | per year |
| Circadian PLUS (yearly) | $24.99 | per year |
| Circadian PLUS (yearly) 40% | $14.99 | per year |
| Circadian PLUS (yearly) 25% | $18.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Purchase - 33% Off | $49.99 | one-time |
| Circadian PRO (Lifetime) | $79.99 | one-time |
| Circadian PRO (Lifetime) 40% | $47.99 | one-time |


## What do users think of Circadian?

Overall sentiment: positive

**Pros**

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

**Cons**

- 🐛 Crashes and bugs
- 🕰️ Inaccurate timing and location tracking
- 💰 Expensive subscription model
- 🤖 Rigid and inflexible scheduling
- 📱 Difficult to customize

**Commonly reported bugs**

- Alarms not working properly
- Location and timezone issues
- Crashes and freezes during use
- Notifications not updating with changes

**Most requested features**

- Customizable alarms and notifications
- Integration with other health/fitness apps
- Historical data tracking and trends
- Personalized recommendations based on user data
- Widget and Apple Watch support

## Recent user reviews (10 of 345)

All indexed reviews: https://appshunter.io/ios/app/circadian-your-natural-rhythm/id1495373007/reviews.md

### 2/5 — Circadian Is NOT the APP It Used To Be…

*2026-08-11, version 4.0.8*

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.

### 2/5 — Doesn’t update times automatically anymore…

*2026-08-03, version 4.0.8*

I used to love this app but not really sure what the point is to have an app (that I pay a subscription fee for) to notify me at different times of the day… when I have to go in every day to turn off location services and turn them back on for it to update to the correct times. I may as well just google the info every day. This hasn’t worked properly for a very long time. Contacted the developers early this year and they told me a fix would be in place sometime in March. It is now August and still doesn’t work. I have done every app update. I have deleted the app and reinstalled it. Multiple times. Not renewing my subscription. What a waste of money this year.

### 5/5 — Best circadian app!

*2026-05-13, version 4.0.7*

I absolutely love this app! It has completely changed my awareness of light and optimizing my time outdoors for the best benefits. I love the reminders and how they adjust to the correct time when I travel. Plus, it’s easy to use and they have excellent customer service whenever I’ve had a question. Highly recommend this one!!

### 3/5 — updates??

*2026-04-09, version 4.0.6*

this app would be amazing if I didn’t have to constantly change the location back and forth to where I live so the times are correct, it doesn’t update on its own otherwise and keeps telling me the wrong times which is honestly frustrating

### 1/5 — Very inaccurate

*2026-04-02, version 4.0.6*

Currently the app shows the sunrise at 06:11 in Brighton , UK , however all other apps indicate the sunrise at 06:32.  And many other inconsistencies.

### 1/5 — Times not accurate

*2026-04-01, version 4.0.6*

I don’t look at Circadian every day, but today I noticed it has the wrong times for sunrise and sunset.  Example: app says sunset is 7:24, while real sunset time is 7:50.

 I double checked the city it is set at and the date and time of day and those are all accurate.

What happened???
If it doesn’t know the correct sunrise and sunset times, how can any of the other times be accurate?

### 5/5 — Love this

*2026-03-25, version 4.0.6*

Love this app and cannot explain it enough! Knowing the times of everything makes holding my rhythm so easy. Use this everyday!

### 5/5 — Love this app!

*2026-03-19, version 4.0.6*

Great customer service! I have sent getting notifications when I first got the app so wrote an email. Got a very speedy response with the exact info to change my settings so I would. 
Being able to have reminders to get out at sunrise, get more light and to optimize sunlight and re establish a healthier circadian rhythm is changing my health and mood. Very much appreciate all the information available as well. Thanks! Highly recommended.

### 2/5 — Times aren’t correct

*2026-03-11, version 4.0.6*

I rely on this app but recently the times have been way off. I’m getting alerts for things like sunrise and sunset - but not at the actual times of those. Maybe it’s a bug or glitch??

### 5/5 — So Helpful

*2026-03-10, version 4.0.6*

I love this app. It’s so easy to use. My favourite thing is I can set notifications for times like sunrise or uva rise so I remember to go outside to get light in my eyes.

## Frequently asked questions about Circadian

### 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.

## Version history (last 5 releases)

### 4.0.8 — 2026-06-14

We improved automated time updates and added various minor fixes.

Thank you for your support, Team Circadian

### 4.0.7 — 2026-04-25

This version improves automated time updates and notifications.
If the times are not correct immediately upon update, please reload your location to force an update.
To reload your location, click your location at the top of the Dashboard or My Day, which takes you to the location settings.
There, manually load another location (make sure it is loaded by checking the dashboard), then reload your current location (autolocate or manual).
If you encounter any issues, please send us a message through the app.

Many thanks!
Team Circadian

### 4.0.6 — 2026-01-26

This version resolves various minor bugs and improves subscription & purchase handling.

We're actively working to improve Circadian.
Feel free to contact us at support@circadian.life if you have any issues, feedback, suggestions, or questions.

### 4.0.5 — 2026-01-06

This version resolves various minor bugs and improves subscription & purchase handling.

We're actively working to improve Circadian.
Feel free to contact us at support@circadian.life if you have any issues, feedback, suggestions, or questions.

Mind your rhythm, mind your light.
Team Circadian

### 4.0.4 — 2025-12-13

Please update to this version as it improves location handling.

## Apps similar to Circadian

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Sleepwave: Alarm & Tracker](https://appshunter.io/ios/app/sleepwave-alarm-and-tracker/id1565509007) | 4.7 (6,512) | Free | Health & Fitness |
| [Music Alarm Clock for Spotify](https://appshunter.io/ios/app/music-alarm-clock-for-spotify/id1460664069) | 4.2 (5,190) | Free | Health & Fitness |
| [Sleep Cycle - Tracker & Sounds](https://appshunter.io/ios/app/sleep-cycle-tracker-and-sounds/id320606217) | 4.7 (28,142) | Free | Health & Fitness |
| [Sleep Time: Cycle Alarm Clock](https://appshunter.io/ios/app/sleep-time-cycle-alarm-clock/id555564825) | 4.7 (5,369) | Free | Health & Fitness |
| [Easy Rise Alarm Clock :](https://appshunter.io/ios/app/easy-rise-alarm-clock/id979948660) | 4.2 (625) | Free | Health & Fitness |
| [Sleep Time+ Cycle Alarm Clock](https://appshunter.io/ios/app/sleep-time-plus-cycle-alarm-clock/id498360026) | 4.8 (2,483) | Free | Health & Fitness |

## Related topics

[circadian rhythm](https://appshunter.io/ios/topics/circadian-rhythm) · [circadian](https://appshunter.io/ios/topics/circadian) · [circadian life](https://appshunter.io/ios/topics/circadian-life) · [circadian clock](https://appshunter.io/ios/topics/circadian-clock) · [late night eats window](https://appshunter.io/ios/topics/late-night-eats-window) · [solar circadian clock](https://appshunter.io/ios/topics/solar-circadian-clock) · [my circadian app](https://appshunter.io/ios/topics/my-circadian-app) · [diurnalis](https://appshunter.io/ios/topics/diurnalis) · [circadian rhythm companion](https://appshunter.io/ios/topics/circadian-rhythm-companion) · [my circadian clock](https://appshunter.io/ios/topics/my-circadian-clock) · [circadian ai](https://appshunter.io/ios/topics/circadian-ai) · [circadian rhythm light meter](https://appshunter.io/ios/topics/circadian-rhythm-light-meter) · [early bird energy](https://appshunter.io/ios/topics/early-bird-energy) · [my circadian rhythm](https://appshunter.io/ios/topics/my-circadian-rhythm) · [dekala home](https://appshunter.io/ios/topics/dekala-home) · [d minder](https://appshunter.io/ios/topics/d-minder) · [circadia](https://appshunter.io/ios/topics/circadia)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-22.*