Circado: Fasting & Diet

It's not about willpower — it's about timing. Track fasting, sleep, sunlight, and coffee. AI food logging. Energy balance with Apple Health.

Sync your eating, sleep, and workouts with your body's natural rhythm. Circado helps you build better eating habits by focusing on when you eat, not just what — no strict diets or calorie obsession required.

WHY TIMING MATTERS Your body runs on an internal clock that affects hunger, energy, and metabolism. Eating at the right time can matter more than counting every calorie. Circado finds your optimal eating window based on your sleep patterns.

FEATURES Fasting Timer Track your eating window and see your progress through 6 metabolic stages — from Fed State to Fat Burning.

Energy Balance See calories eaten vs burned each day. Breakdown of basal and active calories from Apple Health. Track your weight loss pace in kg per week.

Drink Tracking Log water, coffee, tea, juice, smoothies, and more. Caffeine timing based on your cortisol rhythm. Track daily intake against the 400mg limit. Hydration progress bar shows how close you are to your daily water goal.

AI Food Recognition Take a photo of your meal. AI recognizes the food and calculates calories, protein, carbs, and fats.

Sleep Score Log your sleep and get a quality score (0-100) based on duration, depth, and awakenings. See how sleep affects your eating schedule.

Light Score Track your daily sunlight exposure with a score from 0 to 100. Based on outdoor activity, morning light bonus, and cloud cover. See how light exposure correlates with your sleep quality.

Heart Rate Monitor Connect any Bluetooth heart rate strap. See pulse zones in real time. All heart rate data saved to Apple Health.

Circadian Rhythm Body temperature rhythm, weekly consistency score, eating window progress, and optimal coffee timing — all on one screen.

Widgets Fasting timer and nutrition summary on your Home Screen and Lock Screen.

Points & Badges Earn points for logging meals, sleep, and workouts. Build streaks and unlock badges for consistency.

Apple Health Import workouts from Apple Watch, Polar, Garmin, and Strava. Sync weight and sleep. See your daily energy balance.

FOCUS ON WHEN, NOT JUST WHAT Unlike calorie-counting apps, Circado connects your meals with sleep and activity. You see how your daily schedule affects your results — and what you can adjust.

Questions or feedback? support@circado.app

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