# Circadian: Sunrise Sleep — Wake up with the sun

> Wake up with the sun (iPhone/iPad app by Adam Smaka.)

- Source: https://appshunter.io/ios/app/circadian-sunrise-sleep/id6765873609 (this page in markdown: same URL + `.md`)
- Developer: [Adam Smaka](https://appshunter.io/developer/1873789735)
- Category: Health & Fitness, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.0 · 50 MB
- Languages: American English
- Released: 2026-05-05
- Data updated: 2026-06-04
- User reviews in markdown: https://appshunter.io/ios/app/circadian-sunrise-sleep/id6765873609/reviews.md

## What is Circadian?

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/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly Pro | $9.99 | per month |
| Yearly Pro | $39.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime Pro | $99.99 | one-time |



## Version history (last 1 release)

### 0.0.17 — 2026-05-05

No release notes.

## More apps by Adam Smaka

- [Chess Openings: Learn & Train](https://appshunter.io/ios/app/chess-openings-learn-and-train/id6758584355)
- [ToDoV2: Simple Personal Tasks](https://appshunter.io/ios/app/todov2-simple-personal-tasks/id6761408477)

All apps by Adam Smaka: https://appshunter.io/developer/1873789735

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*