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Sleep science for shift workers
Sleep, planned around
the shift you actually have.
Most sleep apps tell you how last night went. ReSync predicts when your alertness will drop, and when to sleep, nap and take caffeine to stay sharp. Options, not orders: you know your roster.
- Sleep timing
- Naps
- Caffeine
Starting with night-shift nurses, where fatigue costs the most.
The problem
Fatigue is dangerous on the ward and on the drive home.
Work nights and your body clock never catches up. The harm shows up in two places at once: the hours you're responsible for patients, and the hour after.
more serious medical errors are made by sleep-deprived clinicians.
Landrigan et al., NEJM
of night-shift nurses have driven drowsy, at the top of the CDC-cited range. The drive home is part of the shift.
CDC-cited survey data
report a fatigue-related crash. In 2025 a nurse died after falling asleep driving home from consecutive night shifts.
CDC-cited survey data
We start with night-shift nurses, the population where the risk is sharpest and the cost lands on one buyer. The same engine carries to:
- Transportation
- Logistics
- Aviation
- Manufacturing
- Other self-funded employers
- Anyone on rotating shifts
How it works
Predict. Choose. Measure. Repeat.
Not tips you read once. It's a closed loop, and the last step is the one nobody else does.
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1
Predict
Give us your roster and recent sleep. ReSync forecasts your alertness across the hours you have to stay sharp, while there's still time to act.
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2
Choose
It generates many candidate plans across sleep, naps and caffeine, drops the ones your schedule can't fit, and returns the best one plus a couple of alternatives. You pick in a tap.
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3
Measure
We check whether you actually did it, and whether it worked. A 30-second reaction-time test confirms your alertness really moved. That's the loop most products leave open.
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4
Time it
Not fixed reminders. ReSync learns when you're actually likely to act and speaks up then, including the high-risk window nobody plans for: the drive home.
Change a shift and the plan re-computes on the spot.
Tonight's plan, three ways. Then a commitment lands and it re‑plans around it.
Why ReSync
Predicting fatigue isn't the hard part.
Established models already estimate fatigue well enough. The unsolved problem is getting someone to act on it at the right moment, and knowing whether it worked.
We close the loop
Trackers watch what you slept. Planners hand you a schedule and never find out whether you kept it. ReSync records what you chose, whether you did it, and whether your alertness actually moved. Nobody measures that last part.
Timed to when you'll act
A fixed 9pm reminder is a guess. ReSync learns the moments you actually respond and speaks up then, usually with fewer prompts, not more.
Your call, not one prescription
Retention is the hardest part of any digital health product, and a single take-it-or-leave-it plan is how you lose it. So ReSync pre-computes the realistic options and you pick one in a tap.
There's a quieter incumbent too: capping hours. When resident hours were capped, the large FIRST and iCOMPARE trials found no improvement in patient safety, and total sleep didn't reliably rise. A blunter schedule doesn't fix fatigue. Deciding better inside the schedule might.
What it's built on. Established, peer-reviewed models of alertness (sleep pressure plus circadian rhythm), extended with your recent sleep, the hours you have to stay awake, caffeine and naps. What we learn about you comes back confidence-labelled, and we stop short of causal claims until the evidence is there.
For hospitals
Fatigue is already on your P&L. It's filed as turnover.
We're not selling a wellness benefit. We're reducing a cost you already track. A paid 8–12 week pilot measures engagement and outcomes, then converts to per-member-per-month.
is what it costs to replace one staff RN. Fatigue and burnout are established drivers of why they leave.
NSI Health Care Retention Report, 2026
is what a single percentage point of RN turnover is worth to the average hospital, every year.
NSI Health Care Retention Report, 2026
simple recurring pricing, with engagement- and outcome-based terms available.
Contract structure
Because many hospitals are self-funded, you already carry the healthcare, absenteeism and turnover costs of poor sleep directly. Aggregate fatigue-risk trends and scheduling integrations are included; individual health data never goes to the employer. Talk to us about a pilot.
Be first to resync.
Email us for early access, or to talk about a pilot. A real person reads it.
hello@weresync.com