ShiftRhythm - Shift Sleep
Night shift sleep & insomnia
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
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.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
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
The developer, Jaeyoun Kim, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Jaeyoun Kim
- Size
- 16.3 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later. - Apple Watch
Requires watchOS 10.0 or later.
- iPhone
- Languages
English and 3 more
- English, Japanese, Korean, Spanish
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Yearly $14.99
- Monthly $2.99
- Lifetime $39.99
- Copyright
- © 2026 Jaeyoun Kim