Kairos: Daily Rhythm Planner

Peak performance, every hour

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

Spring clean your life! Work with your biology — discover your peak hours for focus and creativity. Free. What if you knew exactly when to work, rest, and perform at your peak? YOUR CIRCADIAN ADVANTAGE Your brain, body, and energy follow predictable 24-hour cycles. Research shows cognitive peak is mid-morning, creative flow rises in late morning, and physical peak hits mid-afternoon. Kairos makes this science actionable. 6 ACTIVITY WINDOWS See your optimal hours for: • Focus — deep work and problem-solving • Wellness — exercise and physical performance • Creativity — brainstorming and creative flow • Social — communication and collaboration • Finance — decision-making and strategy • Relationships — emotional connection HOURLY PEAK GUIDE The Timing tab shows a science-backed schedule for all 24 hours — each slot backed by published research on circadian biology, cortisol cycles, melatonin timing, and ultradian rhythms. THE SCIENCE BEHIND IT Built on research by Till Roenneberg, Russell Foster, and Matthew Walker. Each recommendation cites the specific biological mechanism driving it — not guesswork, not superstition. PERSONALIZED TO YOU Enter your birth date to calibrate your chronotype (morning lark or night owl). Kairos adjusts your peak windows to match your natural rhythm. DAILY STREAK Track your daily planning streak and history to see how your energy patterns evolve over time. 17 LANGUAGES SUPPORTED English, Japanese, Chinese, Korean, Spanish, French, German, and more. Work with your biology, not against it. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://appdevelopsk.github.io/privacy-policies/kairos/

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Fixed an issue where the "Remove Ads" in-app purchase button would appear to load indefinitely. Added timeout handling to improve reliability of the purchase flow.

Version 1.2.5

The developer, Kenichiro Sakamoto, 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 Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers

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
  • Kenichiro Sakamoto
Size
  • 38.3 MB
Category
  • Productivity
Compatibility
Requires iOS 14.0 or later.
  • iPhone
    Requires iOS 14.0 or later.
  • iPad
    Requires iPadOS 14.0 or later.
  • iPod touch
    Requires iOS 14.0 or later.
  • Mac
    Requires macOS 11.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English
Age Rating
4+
In-App Purchases
Yes
Copyright
  • © 2025 AppDevelopSK
  • Developer Website
  • Privacy Policy

    • More by Kenichiro Sakamoto