Tonight's 3 steps without a card · Full plan with the 7-day trial (card required)
When should you sleep around your shift?
Enter any shift — nights, days, rotating, warehouse, 24s. Get your sleep window, caffeine cutoff, and nap guidance from the same engine that powers the ShiftSync app.
Only need the caffeine time? Use the caffeine cutoff calculator — it works out your last coffee from your shift end.
What this calculator does
Enter any shift above and the calculator works out tonight's 3 steps from your actual start and end times: the sleep window to protect, your caffeine cutoff, and when to block light on the way home — all without a card. Start the 7-day trial (card required) and the same engine plans your full week, adding the 72-hour fatigue chart, saved schedules, and calendar export.
Quick answers
What do I get without a card?
Tonight's 3 steps, computed from the shift you enter: your sleep window, your caffeine cutoff, and your light-blocking time. No card and no account — enter your shift and your steps are right on this page.
What does the full plan add?
The full plan covers every shift in your week, not just tonight: the 72-hour fatigue chart, your fatigue score, saved schedules, and calendar export. It runs on the 7-day trial (card required) — cancel before day 7 ends and pay nothing. After the trial, Plus is $9.99/month or $79/year.
How is the caffeine cutoff calculated?
The cutoff is set 8 hours before your planned sleep — ShiftSync's planning rule. The calculator first builds your sleep window from your shift times, then counts back 8 hours, so your cutoff moves when your shift moves.
Does it work for rotating shifts or 24-hour shifts?
Yes. Enter any shift — nights, days, rotating patterns, or 24s — and the 3 steps are computed from those times. There are also role pages with presets for nurses, doctors, EMS, flight medics, warehouse teams, truckers, and dispatchers.