Circadian: Your Natural Rhythm

Natural Cycles

In-app purchases

About this app

🌟 OPTIMISE 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 app, circadian rhythm app and natural cycles app, designed to reset your circadian clock. By tuning into your circadian rhythm and honouring your biorhythms, you’ll enjoy deeper sleep, balanced hormones and a more vibrant natural life.

☀️ ALIGN WITH SUNLIGHT & SEASONS
This circadian rhythm app harnesses daylight patterns—from a gentle sunrise alarm clock to reliable sunset alarm reminders—to guide your day. Set a sunrise alarm clock to greet each new morning, then unwind with a sunset alarm as dusk falls. Use a sunrise alarm for a soft wake-up and customise the sunrise alarm clock for gradual light. With the circadian rhythm alarm clock, your body’s circadian clock will sync naturally to light and dark, helping you flow through your natural cycle.

🛏️ BEDTIME & RHYTHM CALCULATOR
In this circadian rhythm app, plan your ideal rest with our seasonal bedtime calculator and built-in rhythm calculator. Swap rigid schedules for nature’s timing: anchor bedtime to dusk and wake naturally with a rise sleep reminder. Our rhythm calculator adapts as the seasons change, ensuring you always get the rest you need. Studies confirm syncing with natural cycles outperforms any sleep cycle tracker.

🍴 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 sunset to match your circadian rhythm and support your natural cycle. Research shows skipping breakfast or dining late disrupts this rhythm and harms metabolic health. With the Circadian app, set eating and fasting reminders that honour nature’s timing for balanced blood sugar and deeper sleep.

🧬 THE SCIENCE OF CIRCADIAN RHYTHM
Built on Nobel Prize–winning chronobiology, this circadian rhythm app explains how your internal clock and biorhythms regulate melatonin, cortisol and vitamin D production. Getting the right circadian cues—light and darkness, food and exercise—at the right time is key to natural health. Explore our in-app library for insights on your circadian rhythm, artificial light, exercise timing and more to transform your natural life.

🌅 YOUR NATURAL ALARM CLOCK
Wake gently with a morning alarm clock or sunrise alarm clock mode, then drift off with the circadian rhythm alarm clock feature. Choose a sunrise alarm to start your day and a sunset alarm to wind down. Let the circadian clock guide your wake and rest cycles for seamless days. Use the dashboard to check my circadian clock.

☘️ ENJOY TRUE RHYTHM & HEALTHY LIVING
As a top circadian rhythm app and natural cycles app, Circadian focuses on pure nature-driven guidance—no complicated integrations. Embrace your internal circadian rhythm, enjoy consistent natural cycles and thrive in a healthier natural life.

🗝️ KEY ASPECTS
• Natural cycles app: align routines with dawn, sunrise, sunset and darkness
• Circadian clock synchronisation: wake, eat, work and rest in harmony
• Circadian rhythm alarm clock: sunrise alarm clock, sunrise alarm and sunset alarm modes
• Bedtime calculator & rhythm calculator: optimise sleep hours and fasting windows
• Daily planner, day planner & daily routine planner: organise meals, exercise and rest in one daily planner routine time table
• Lifestyle planner: build sustainable habits in sync with natural cycles and natural life
• My circadian clock dashboard: track your progress and insights

Download the Circadian app today and step into harmony and balanced wellbeing with your new lifestyle planner.

Ratings and reviews

I love the idea behind this. So much so that I did buy the full membership, so I own it forever now. Having said that, the app does seem really glitchy. After the second day I stopped receiving notifications. I emailed customer service and although the response time was good, the answer received was not helpful and did not solve my problem. I force stopped the app, which did seem to help for 12 hours or so, but as of right now, zero notifications. Not even alarms are going off.

Update - was emailed promptly about this issue, which is rare these days for apps. They corrected the issue within a few hours of me reaching out. I absolutely LOVE this app and have been using it for years. It really has helpede be more aware of my time spent inside, reminding me to get outside. A+ app and customer service Update erased my plan and settings, and is telling me I now have to pay a one time fee to use all the notifications that I previously used and paid for with my annual plan.

Great app but the notifications have stopped working despite the update. It is very buggy. Now the app just crashes and won't let me open it. And I'm a paying customer.

What's new

We are very happy to introduce translations.
You can now select English, Chinese, German and Spanish.

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

Mind your rhythm, mind your light ☀️
Team Circadian