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Circadian Energy

Circadian Energy

Body Clock & Energy Tracker

3 ratings
1 review
💪 Health & Fitness
📊 Productivity
Free
In-App Purchases

Details

  • Released
  • Updated
  • March 10, 2026
  • May 27, 2026

Features

Developer

Markus Sekulla
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Circadian Energy screenshot #1 for iPhone
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Circadian Energy screenshot #5 for iPhone
iphone
watch
🧾$4.99
In-App Purchase↘︎
⭐1
Reviews↘︎
❓8 answered
FAQ↘︎
📦~ in 4 days
Updates frequency↘︎
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About

This app analyzes your sleep, heart rate, and workouts to predict your daily energy levels and optimal sleep times. It provides personalized insights and real-time updates via widgets and Apple Watch complications.

✓Personalized energy curve calculation
✓Optimal sleep window recommendations
✓HealthKit data integration
✓Chronotype detection
✓Home screen and lock screen widgets
✓Apple Watch complications
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What's New in Circadian Energy

1.1.0

May 27, 2026

- New Trends view: compare today's energy curve against any past day or date range. - Optional notifications in the morning and evening. - Insight right under the curve on the Dashboard: explains what is shaping your curve the most today. - Smaller bug fixes that could occasionally make the curve sit too high. Enjoy the update.

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In-App Purchases

$4.99

Unlock Circadian Energy

Energy curve, widgets, and sleep analysis.

User reviews

Most RecentHighest RatedLowest Rated

YAYY

I love how simple this is, it just gives me an energy score. It’s a really clean interface and the watch complications are really nice. It’s also cheap! I didn’t have to pay a subscription for this, just $5 which is maybe even less than I’d be willing to pay for it. Free trial for 7 days too and you don’t have to give payment info beforehand so you don’t get caught paying a subscription when you didn’t intend to
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MicrowavedTilapiaMicrowavedTilapia

Response from developer

Thanks for the kind words! I built Circadian Energy as something I wanted to use myself, so keeping it simple with fair pricing was a no-brainer. Glad that resonates. And nice to hear the watch complications are getting some love too. Hope it keeps helping you stay on top of your energy!

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FAQ

What is Circadian Energy?

Circadian Energy calculates your personal energy curve for the day based on your sleep, heart rate variability, and workouts. It helps you understand when you're most fit and when your next peak energy is expected.

How does Circadian Energy personalize my energy curve?

It uses your real HealthKit data, including sleep amount and quality, heart rate variability, workout impact, sleep debt, chronotype, daylight exposure, and wrist temperature to create a unique energy profile.

Does Circadian Energy have ads?

No, Circadian Energy does not contain advertisements. The app is free to try for 7 days and then requires a one-time purchase to unlock all features.

Can I see my energy level on my watch?

Yes, Circadian Energy offers four Apple Watch complications (Circular, Rectangular, Corner, and Inline) to display your current energy level at a glance directly on your watch face.

Is my health data safe with Circadian Energy?

Yes, all health data stays on your device. The app emphasizes privacy with no account creation, no cloud storage, and no tracking of your personal information.

What devices does Circadian Energy support?

Circadian Energy is supported on iPhone and Apple Watch. Widgets are also available for your home screen and lock screen.

How often is Circadian Energy updated?

The latest version, 1.1.0, was released on May 27, 2026, indicating active development. Users can expect regular updates to improve functionality and add new features.

What is the cost of Circadian Energy?

Circadian Energy offers a 7-day free trial with all features. After the trial, a one-time purchase is required to unlock the app permanently, with no subscriptions or hidden costs.