# Circadian - Rhythm & Sleep — Master your circadian rhythm

> Master your circadian rhythm (iPhone/iPad app by Han Fei Shu.)

- Source: https://appshunter.io/ios/app/circadian-rhythm-and-sleep/id6767554321 (this page in markdown: same URL + `.md`)
- Developer: [Han Fei Shu](https://appshunter.io/developer/1466724889)
- Category: Health & Fitness
- Price: $0.99
- Age rating: 4+
- Requires: iOS 17.0 · 6 MB
- Languages: Chinese (Simplified, China)
- Released: 2026-05-13
- Data updated: 2026-08-01
- User reviews in markdown: https://appshunter.io/ios/app/circadian-rhythm-and-sleep/id6767554321/reviews.md

## What is Circadian?

**Master Your Rhythm, Reclaim Your Energy.**

Do you struggle with staying up late, hitting the snooze button repeatedly, or feeling groggy throughout the day? 
**Circadian** is an intelligent sleep management tool designed to help you rebuild your natural body clock and improve your sleep quality. Through our scientific "Regular Sleep + Wake-up Challenge + Habit Building" loop, we transform waking up from a chore into an achievement.

**Key Features:**

*   **Smart Circadian Tracking**: Real-time display of your current physiological state (Daytime, Bedtime Prep, Sleeping). Based on your personalized plan, the app intelligently reminds you when to put down your phone and start unwinding.
*   **Hardcore Wake-up Challenges**: Designed for the chronic snoozers. Choose from math problems, photo verification, or QR code scanning to dismiss your alarm. Force your brain to wake up and eliminate endless snoozing.
*   **Visualized Sleep Stats**: Intuitive charts showing your bedtime consistency for the week. Gain insights into your routine trends and witness every small improvement through data.
*   **Minimalist Design**: Built with iOS native design aesthetics for a smooth and natural experience. Full support for Dark Mode to protect your eyes at night.
*   **Achievement System**: Earn points by sticking to your healthy routine and unlock different levels of challenges. Make self-discipline as engaging as a game.

**Why Choose Circadian?**
We believe the best sleep management isn't just about logging—it's about active intervention. Circadian is more than just an alarm clock; it's your digital companion for building a sustainable, healthy lifestyle.

Download Circadian today and start your journey toward a more disciplined and energized life!


## Version history (last 5 releases)

### 1.0.5 — 2026-06-10

Optimized the product experience

### 1.0.4 — 2026-06-06

Optimized the product experience

### 1.0.3 — 2026-06-05

Optimized the product experience

### 1.0.2 — 2026-06-04

Optimized the product experience

### 1.0 — 2026-05-13

No release notes.

## More apps by Han Fei Shu

- [TimeCell-Time Manage](https://appshunter.io/ios/app/timecell-time-manage/id1478692299)
- [关系网-记录点点滴滴](https://appshunter.io/ios/app/id1524255622)
- [MoodDairy-Keep your good mood](https://appshunter.io/ios/app/mooddairy-keep-your-good-mood/id1529084003)
- [Everything-Save All](https://appshunter.io/ios/app/everything-save-all/id1551534698)
- [Album Manager-EmptyAlbumKiller](https://appshunter.io/ios/app/album-manager-emptyalbumkiller/id1563194243)
- [XMap-Better Map](https://appshunter.io/ios/app/xmap-better-map/id1564731307)

All apps by Han Fei Shu: https://appshunter.io/developer/1466724889

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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 2026-08-01.*