# ShiftRhythm - Shift Sleep — Night shift sleep & insomnia

> Circadian rhythm guidance for night shift workers to optimize sleep and light exposure. (iPhone/iPad app by Jaeyoun Kim.)

- Source: https://appshunter.io/ios/app/shiftrhythm-shift-sleep/id6776639759 (this page in markdown: same URL + `.md`)
- Developer: [Jaeyoun Kim](https://appshunter.io/developer/6772886377)
- Category: Health & Fitness
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 16 MB
- Languages: American English, Japanese, Korean, European Spanish
- Released: 2026-06-04
- Data updated: 2026-08-24
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/shiftrhythm-shift-sleep/id6776639759/reviews.md

## What is ShiftRhythm?

Night shifts flipped your sleep? Enter your roster and ShiftRhythm tells you when to sleep, when to nap, and when to seek or avoid light — today.

WHAT IT DOES
• 24-hour body-clock dial — see your estimated melatonin onset (DLMO) and biological night (CBTmin) at a glance
• Light, nap & caffeine guidance — timed to your circadian rhythm and updated as your shifts change
• Sleep score, sleep debt & recovery — last night's sleep plus HRV and resting heart rate from Apple Watch, telling you whether to push or recover
• Presets that match real rosters — Panama 2-2-3 schedule (day/night), Pitman, DuPont, Fire 48/96, 12-hour rotating shifts, plus Korean and Japanese patterns. Or build your own custom rotation
• Melatonin timing card (optional) — an informational window based on your estimated body clock. Not a recommendation to take melatonin; talk to your doctor or pharmacist first

BUILT FOR SHIFT WORKERS
Whether you're a night shift nurse, a firefighter on 48/96, a plant operator on a DuPont rotation, or a driver on a rotating roster — ShiftRhythm adapts to your schedule, not the other way around.
• Tap any calendar day to correct that day's shift
• Works from your schedule alone — no Apple Watch required
• Apple Watch app and widgets included; available in English, Spanish, Korean, and Japanese

PRIVATE BY DESIGN
• No account. No server. Your data stays on your phone.
• All circadian math runs on-device — health data never leaves your iPhone
• No ads, no tracking

PRICING
• 30-day free trial — full features, no account needed
• Then Monthly or Annual (Annual saves vs. monthly), or a one-time Lifetime purchase if you'd rather not subscribe
• Subscriptions auto-renew; cancel anytime in Settings > Apple Account > Subscriptions

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://yoonspower.github.io/shiftrhythm/privacy.html

ShiftRhythm is for general wellness and reference only. It is not a medical device and does not diagnose, treat, or monitor any medical condition. Values shown are estimates and may be inaccurate. Consult a professional for health concerns.

## Key features

- Personalized sleep and nap timing
- Light exposure guidance
- Circadian rhythm dial
- Sleep score and debt tracking
- Roster presets and custom schedules
- Apple Watch app and widgets

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Yearly | $14.99 | per year |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Lifetime | $39.99 | one-time |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/shiftrhythm-shift-sleep/id6776639759/reviews.md

### 5/5 — 쓸만한거같아요

*2026-06-10*

교대근무용 특화라 너무좋네여

### 5/5 — 교대 근무자 필수 어플 발견!

*2026-06-09*

교대근무를 하다 보면 생활 패턴이 계속 바뀌어서 수면 관리가 정말 어렵다는건 전부 아실텐데 저도 주,야간근무를 반복하면서 항상 피곤함을 달고 사는중입니다.

제대로 된 수면패턴을 갖추기 위해 이런저런 정보를 검색하던 중 해당 어플을 발견하게 돼서 사용해봤는데 교대 근무자분들에게는 꼭 필요한 어플이라고 생각이 들었습니다!

일단 시프트 리듬은 단순히 근무표를 기록하는 수준이 아니라 근무자에 생체리듬과 수면 패턴을 분석하여 최적에 생활패턴을 고려해준다는 점이 가장 인상 깊었습니다.

특히 근무 일정에 맞춰 수면 시간을 계획하고 컨디션을 관리할 수 있도록 도와주는 부분이 실질적으로 도움이 믾이 됐으며, 일반적인 캘린더 앱이나 알람 앱으로는 해결되지 않던 부분을 교대근무자의 입장에서 고민하고 만든 느낌이 들었습니다.

UI도 복잡하지 않아 처음 사용하는데 쉽게 적응 할 수 있었고,  필요한 정보가 한눈에 보이기 때문에 편리했습니다.

병원, 공장, 생산직, 보안직 등 교대근무를 하시는 분들이라면 한 번쯤 사용해볼 만한 어플이라고 생각하고 앞으로도 꾸준한 업데이트를 통해 더 많은 기능이 추가되길 기대하겠습니다!

## Frequently asked questions about ShiftRhythm

### What is ShiftRhythm?

ShiftRhythm is a health and fitness app designed to help night shift workers manage their sleep and light exposure. It uses your roster to provide personalized guidance on when to sleep, nap, and interact with light.

### Does ShiftRhythm require an Apple Watch?

No, ShiftRhythm works from your schedule alone and does not require an Apple Watch. However, it does include an Apple Watch app and widgets for enhanced functionality.

### How does ShiftRhythm track sleep?

ShiftRhythm calculates a sleep score, sleep debt, and recovery based on data from your Apple Watch, including HRV and resting heart rate. This helps you understand whether to push or recover.

### What kind of rosters does ShiftRhythm support?

ShiftRhythm supports various real-world rosters like Panama 2-2-3, Pitman, DuPont, Fire 48/96, 12-hour rotating shifts, and custom rotations. You can also build your own custom schedule.

### Is ShiftRhythm free to use?

ShiftRhythm offers a 30-day free trial with full features. After the trial, it offers Monthly, Annual, or a one-time Lifetime purchase. Subscriptions auto-renew but can be cancelled anytime.

### Does ShiftRhythm have ads?

No, ShiftRhythm is designed with privacy in mind and does not have ads or tracking. All circadian math runs on-device, and your health data never leaves your iPhone.

### What languages does ShiftRhythm support?

ShiftRhythm is available in English, Spanish, Korean, and Japanese, making it accessible to a global audience of shift workers.

### Is ShiftRhythm a medical device?

No, ShiftRhythm is for general wellness and reference only. It is not a medical device and does not diagnose, treat, or monitor any medical condition. Consult a professional for health concerns.

## Version history (last 5 releases)

### 1.5.6 — 2026-07-04

• 3 new cards — a direction-aware light plan, commute driving safety, and an alertness level
• During a night shift, the app now shows "At work" with your clock-off and sleep times
• The home widget now keeps "what to do now" up to date on its own
• Display fixes and expanded Spanish localization

### 1.5.4 — 2026-06-18

We reworked the app to speak the way shift workers actually do.
• Clearer, more relatable wording across onboarding, home, paywall, and info cards
• A short "why" line on the dial
• VoiceOver support
• Improved timezone accuracy in notifications, day labels, and the widget

### 1.5.3 — 2026-06-17

Stability improvements and optimizations.

### 1.5.2 — 2026-06-13

Improved search and small fixes. Thanks for using ShiftRhythm!

### 1.5.1 — 2026-06-12

v1.5.1 Update

- 5 new US shift presets: Panama 2-2-3 (day/night), Pitman, DuPont, and Fire 48/96. Pick the one that matches your roster and you're set.
- New melatonin timing card. Turn it on in Settings to see a suggested window on the Today tab, based on your estimated body clock. (Informational only — not a recommendation to take melatonin; talk to your doctor or pharmacist first.)
- ShiftRhythm now speaks Spanish.
- New annual plan and lower prices. Annual saves vs. monthly, and the one-time Lifetime purchase is still there. Existing purchasers keep their access unchanged.

## Apps similar to ShiftRhythm

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Steady: Shift Sleep](https://appshunter.io/ios/app/steady-shift-sleep/id6768091450) | 5.0 (1) | Free | Health & Fitness |
| [KyomoFit – Daily Fitness](https://appshunter.io/ios/app/kyomofit-daily-fitness/id6748648961) | — | Free | Health & Fitness |
| [AfterShift: Sleep & Shift Work](https://appshunter.io/ios/app/aftershift-sleep-and-shift-work/id6757163182) | 3.0 (2) | Free | Health & Fitness |
| [Post Dose: GLP-1 Meal Planner](https://appshunter.io/ios/app/post-dose-glp-1-meal-planner/id6761559780) | 5.0 (2) | Free | Health & Fitness |
| [Shift Worker Sleep Management](https://appshunter.io/ios/app/shift-worker-sleep-management/id6757702542) | 5.0 (6) | Free | Health & Fitness |
| [Aptiva: AI Personal Trainer](https://appshunter.io/ios/app/aptiva-ai-personal-trainer/id6758992247) | 4.6 (10) | Free | Health & Fitness |

## More apps by Jaeyoun Kim

- [ParkPin - Where Did I Park](https://appshunter.io/ios/app/parkpin-where-did-i-park/id6772886375)
- [MacBeam](https://appshunter.io/ios/app/macbeam/id6773570129)
- [Hearken — Watch Voice Notes](https://appshunter.io/ios/app/hearken-watch-voice-notes/id6776046765)
- [EarLog: Tinnitus Diary](https://appshunter.io/ios/app/earlog-tinnitus-diary/id6779152193)

All apps by Jaeyoun Kim: https://appshunter.io/developer/6772886377

---

*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 2026-08-24.*