Kairis: Circadian Rhythm

Mindfulness, Sleep & Focus

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

NEW: Apple Health integration. Sync sleep, workouts, mindfulness, and more to your Circadian Clock. Includes Home Screen widgets and live biological metrics. Free Circadian Clock + iPhone widgets. See when your body is primed for deep work, training, and rest — minute by minute, powered by the cosinor model. Sync compatible health data from Apple Health to personalize your experience. Kairis is not a habit tracker. It's a biological timing system, built for people who want to operate at peak capacity — consistently, deliberately, and in sync with their physiology. — THE CIRCADIAN CLOCK (FREE) Visualize your day in biological time. The clock maps how your body shifts hour by hour: • Performance: alertness, reaction time, coordination, muscle strength, cardiovascular efficiency • Metabolism: blood pressure, body temperature, heart rate, glucose tolerance • Hormones: melatonin, testosterone, cortisol, growth hormone • Restoration: pulmonary function, sleep propensity, digestive rhythm • Sleep & wake cycle: stages (N1, N2, N3, REM), positioning, time to bedtime, time to wake Powered by the cosinor model — the statistical method used in chronobiology research — for sharp, smooth, individualized daily curves. — APPLE HEALTH Connect Apple Health to automatically import compatible health data. • Use Apple Health sleep data to personalize your Circadian Clock • Sync supported workouts, mindfulness sessions, heart rate, and other health metrics • Reduce manual tracking and keep your data up to date across apps — HOME SCREEN WIDGETS (FREE) Your circadian state, always visible. Track your performance window, sleep cycle stage, hormone levels, and time-to-bedtime directly on your Home Screen — without opening the app. — EXTERNAL CONDITIONS Your biology responds to the environment. Monitor what's shaping your rhythms: • Solar patterns: day length, sunrise, sunset • Lunar cycle: current phase with visual indicator • Atmospheric: temperature and UV index — PROTOCOLS FOR LIFE Turn insight into action. Structure your day with protocols mapped to your biology: • Morning, afternoon, and evening routines • Focused work blocks • Training sessions • Recovery periods • Bedtime wind-down Recurring schedules, configurable notifications, a clean execution system. Think of it as a configurable daily plan that runs in lockstep with your physiology. — MINDFULNESS • Breathing: physiological sigh, box breathing, cyclic hyperventilation, 4-7-8 — calibrated to your lung capacity with precise inhale, exhale, and hold control • Meditation: focused attention, open monitoring, reflective, generative — guided or unguided, 1 minute to 1 hour • Yoga Nidra: full sessions for deep rest and NSDR • Journaling: AI-generated prompts (where supported) plus curated libraries across four categories Background audio, ambient sounds (nature, ocean, white/pink/brown noise), binaural beats, multiple gong styles. Every session is fully configurable. — TRACK WHAT FUELS PERFORMANCE Monitor the inputs that shape your biology — manually or through supported Apple Health integrations: • Light exposure • Sleep quality • Cardio, resistance, breathing, and meditation minutes • Social interactions (dyadic, triadic, group, familial) • Internal interactions (emotional processing, cognitive restructuring, appreciation, intentions) Daily goals with visual streaks that reflect real physiological support — not arbitrary habits. — Kairis is built for operators, athletes, and anyone who wants to work with their physiology instead of against it. — Terms of Use: https://www.kairis.app/terms Privacy Policy: https://www.kairis.app/privacy Support: https://www.kairis.app/support

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v1.2 — Apple Health integration • New Apple Health integration syncs compatible health data with Kairis • Import sleep, workouts, mindfulness sessions, heart rate, and other supported Health metrics automatically • Circadian Clock can use Apple Health sleep data to personalize daily biological rhythms • Home Screen widgets bring live circadian insights to your Home Screen • Circadian Clock, powered by the cosinor model, tracking alertness, sleep stages, hormone levels, restorative functions, and more • Performance and stability improvements The Circadian Clock and all widgets remain free to use.

Version 1.2

The developer, Vladimir Olexa, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • Vladimir Olexa
    Size
    • 80.3 MB
    Category
    • Health & Fitness
    Compatibility
    Requires iOS 18.6 or later.
    • iPhone
      Requires iOS 18.6 or later.
    • Mac
      Requires macOS 15.6 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 2.6 or later.
    Languages
    • English
    Age Rating
    9+
    In-App Purchases
    Yes
    • Kairis Lifetime $199.99
    • Kairis Annual $89.99
    • Kairis Monthly $12.99
    • Learn More
    Copyright
    • © 2026 Vladimir Olexa
  • Developer Website
  • Privacy Policy

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