Nocturne: Shift Work Sleep

Every sleep app assumes you go to bed at eleven.

Nocturne is for the rest of us — nurses, paramedics, police, drivers, crew, plant operators, people on call, new parents, anyone whose week does not run 9 to 5.

Put your roster in once. Nocturne works out where your body clock actually is and turns it into a day you can follow.

THE BODY CLOCK DIAL
Twenty-four hours as one circle. Your shift, your sleep, your nap, the windows where light helps and the windows where it hurts, and a predicted alertness curve running through the middle.

A PLAN, NOT PLATITUDES
· When to sleep — sized backwards from when you actually have to be up
· When to nap — including the pre-shift nap that flattens the 03:00 low
· When to get light, and when to put sunglasses on for the drive home
· Your last coffee, computed from your own caffeine clearance
· When you will crash — before you do

YOUR ROSTER, HANDLED
Six rotation templates — 4 on / 4 off, 12-hour days and nights, Continental, Pitman, permanent nights — that fill three months in one tap. Or drag in your own shifts.

THE NUMBERS THAT MATTER
A rolling sleep-debt ledger. Circadian drift — how far your lived schedule has pulled away from the clock you were born with. And the week ahead as a single heatmap, so you can see the block of nights arriving before it lands on you.

WHY, NOT JUST WHAT
Every recommendation can tell you the mechanism behind it. The engine is the published two-process model of sleep regulation, the light phase-response curve and first-order caffeine kinetics — running on your phone, with no wearable, no location permission and no account required to start.

NOCTURNE PRO
Free forever: today's plan, the roster, the sleep log, the caffeine ledger, the nap planner, three dial faces and the next three days of the forecast. Pro adds days 4-7 of the forecast, the jet lag day-by-day, unlimited history, light and low-point reminders, and four more dial faces.

Nocturne is educational software. It does not diagnose sleep disorders and is not a substitute for occupational health or your doctor. Never use a predicted alertness figure to decide you are safe to drive.

Nocturne Pro is available as a monthly or yearly subscription. Subscriptions are billed through Google Play and renew automatically until cancelled; you can manage or cancel them at any time in the Play Store.

Terms of Use: https://szymdzie.github.io/nocturne/terms.html
Privacy Policy: https://szymdzie.github.io/nocturne/privacy.html

Recent changes:
Nocturne arrives on Android. Put your roster in once and get a real day back: when to sleep, when to nap, when light helps, when to stop caffeine and when your alertness will bottom out.