Shift Fuel vs ShiftRhythm
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Shift Fuel
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Shift Fuel is the meal-timing app built for rotating shift workers β nurses, CNAs, hospital crews, and anyone on nights or a 2-2-3. No macro tracking. No calorie math. Clear windows: fuel before your shift, eat mid-shift, wind down after nights. WHAT YOU GET (FREE) β’ Meal windows aligned to YOUR shift start, sleep, and rotation β’ Today view with countdowns and whatβs next β’ Rotations: 2-2-3, 4-on-4-off, Panama, or a custom week β’ Night-shift aware caffeine and wind-down guidance β’ On-device privacy β schedule stays on your iPhone / iCloud SHIFT FUEL PRO β’ Full week meal planner across your rotation β’ Local reminders before eating windows β’ Home Screen widget & Live Activity β’ Monthly, yearly, or pay-once lifetime Made for people who eat dinner at 6 PM before a 7-to-7 β because generic diet apps donβt get shift life. Not medical advice. Privacy Policy: https://shiftfuel.monarch-labs.com/privacy Terms of Use (EULA): https://shiftfuel.monarch-labs.com/terms Apple Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
ShiftRhythm
This app helps night shift workers optimize their sleep and light exposure based on their unique work schedules. It provides personalized guidance for sleep, naps, and light interaction to align with your body's natural circadian rhythm.
- Personalized sleep and nap timing
- Light exposure guidance
- Circadian rhythm insights (DLMO, CBTmin)
- Sleep score and debt tracking
- Customizable roster presets
- Apple Watch app and widgets
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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 β today. WHAT IT DOES β’ 24-hour body-clock dial β see your estimated melatonin onset (DLMO) and biological night (CBTmin) at a glance β’ Light, nap & caffeine guidance β timed to your circadian rhythm and updated as your shifts change β’ Sleep score, sleep debt & recovery β last night's sleep plus HRV and resting heart rate from Apple Watch, telling you whether to push or recover β’ Presets that match real rosters β 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 β’ Melatonin timing card (optional) β 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 β ShiftRhythm adapts to your schedule, not the other way around. β’ Tap any calendar day to correct that day's shift β’ Works from your schedule alone β no Apple Watch required β’ Apple Watch app and widgets included; available in English, Spanish, Korean, and Japanese PRIVATE BY DESIGN β’ No account. No server. Your data stays on your phone. β’ All circadian math runs on-device β health data never leaves your iPhone β’ No ads, no tracking PRICING β’ 30-day free trial β full features, no account needed β’ Then Monthly or Annual (Annual saves vs. monthly), or a one-time Lifetime purchase if you'd rather not subscribe β’ 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.
Screenshots
Verdict
The clearest difference is update cadence: ShiftRhythm at every 2 days against Shift Fuel's every 5 months. ShiftRhythm also leads on iOS requirement (17.0 vs 26.4). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Shift Fuel sells 2 in-app purchases, starting at $2.99 per month and ShiftRhythm sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Shift Fuel ships an update every 5 months, ShiftRhythm every 2 days. The most recent releases landed on November 5, 2026 and November 1, 2026 respectively.
| Parameter | Shift Fuel | ShiftRhythm |
|---|---|---|
| Price | Free | Free |
| Positive reviews | β | 100.0% of reviews |
| Update frequency | Every 5 months | Every 2 days β better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | β | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, Apple Watch β better |
| Requires iOS | 26.4 | 17.0 β better |
| Further details β not scored | ||
| Size | 16 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | Monarch Labs Collective | Jaeyoun Kim |
In-app purchases
Shift Fuel
- Shift Fuel Pro Monthly$2.991 Month
- Shift Fuel Pro Yearly$14.991 Year
ShiftRhythm
- Monthly$2.991 Month
- Yearly$14.991 Year
- Lifetime$39.99
Questions
Is Shift Fuel free?
Is ShiftRhythm free?
Do Shift Fuel or ShiftRhythm have ads?
Which is updated more often, Shift Fuel or ShiftRhythm?
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