Circadian: Sunrise Sleep

Wake up with the sun

Only for iPhone

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

iPhone

Calculate your ideal bedtime based on local sunrise. No wearables, no subscriptions — just your natural rhythm. Circadian tells you exactly when to go to sleep so you can wake up with the sunrise. Instead of guessing your bedtime, Circadian calculates tomorrow's sunrise for your exact location and subtracts your preferred sleep duration. The result is a simple, personalized countdown to your ideal bedtime. KEY FEATURES • Sunrise-based bedtime calculator using your GPS location • Real-time countdown to your optimal sleep time • Choose your sleep duration: 8, 9, or 10 hours • Clean, minimal design with no clutter • No account required — start as a guest instantly • Optional account upgrade to secure your data HOW IT WORKS 1. Open the app and grant location access 2. Circadian calculates your local sunrise time 3. See your personalized bedtime and countdown 4. Go to sleep on time, wake up with natural light Whether you are into biohacking, optimizing your circadian rhythm, or simply want more energy in the morning, Circadian gives you the one number that matters: your bedtime. No wearables. No subscription. No complicated charts. Just your bedtime, calculated by nature. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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The developer, Adam Smaka, 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 Linked to You

    The following data may be collected and linked to your identity:

    • Location
    • Contact Info
    • 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
  • Adam Smaka
Size
  • 52.6 MB
Category
  • Health & Fitness
Compatibility
Requires iOS 16.0 or later.
  • iPhone
    Requires iOS 16.0 or later.
  • Mac
    Requires macOS 13.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
  • English
Age Rating
9+
In-App Purchases
Yes
  • Lifetime Pro $99.99
  • Yearly Pro $39.99
  • Monthly Pro $9.99
  • Learn More
Copyright
  • © 2026 Adam Smaka
  • Privacy Policy

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