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About this app

Sync your internal biological clock and unlock your full energy potential with BioClock — your 100% offline circadian rhythm planner and sleep optimizer.

BioClock helps you align your daily activities with your natural circadian rhythm. By calculating your alertness peaks, ideal sleep windows, and wind-down periods based on your chronotype and light exposure, BioClock empowers you to achieve restfulness without relying on external servers or data tracking.

KEY FEATURES:

• 24-Hour Circadian Dial: Visualize your daily rhythm with an intuitive, dynamic 24-hour clock wheel that displays your peak cognitive performance, melatonin release windows, and optimal bedtime.
• Sleep Cycle Dashboard: Plan your rest with interactive shift adjustment tools and visual wave charts based on natural 90-minute sleep cycles.
• Personalized Chronotypes: Customize calculations tailored to your body's natural clock — whether you are an Early Bird (Lark), Intermediate (Bear), or Night Owl (Wolf).
• Daily Action Tracking: Effortlessly log morning sunlight exposure and wake times to reinforce your body's circadian entrainment.
• Morning Recap & Alignment: Review your consistency score, circadian alignment percentage, and daily energy forecasts to build sustainable habits.
• Ambient Wind-down Alerts: Configure local vibration and visual cues to remind you when it's time to dim lights and prepare for restful sleep.

PRIVACY & OFFLINE FIRST:
BioClock operates completely offline. We do not track, collect, store, or transmit any personal data. Your daily logs, sleep settings, and preferences remain strictly on your device. No account creation or internet connection is required.

DISCLAIMER:
BioClock is intended for general wellness and educational self-improvement purposes only. It is not designed or intended to diagnose, treat, prevent, or cure any medical condition or sleep disorder.
Offline circadian rhythm planner for optimal sleep, wake, and energy timing.
Updated on
Jul 21, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • No data shared with third parties
    Learn more about how developers declare sharing
  • No data collected
    Learn more about how developers declare collection

What’s new

• 24-hour dynamic circadian rhythm dial showing peak alertness and sleep windows.
• Sleep schedule planning tools with 90-minute sleep cycle visualizer.
• Chronotype customization for Early Birds, Night Owls, and Intermediates.
• Morning recap panel with consistency scoring and alignment metrics.
• 100% offline functionality with zero data collection.