Tell me about your flight.

No. Longway is a planning tool grounded in published chronobiology literature. The caffeine and melatonin recommendations are general guidance, not prescriptions. If you have a sleep disorder, take prescription medication, are pregnant, or have a chronic medical condition, talk to your doctor before following any of it.

Your chronotype — whether you naturally run earlier or later than average — shifts where your body's circadian low point sits in the day. The protocol times caffeine cutoffs, light exposure, and melatonin doses around that low point, so getting it right is the difference between a plan that fits you and a plan written for the average human.

The protocol is built from foundational chronobiology research: Burgess on melatonin phase-response curves, Khalsa & St Hilaire on the light PRC, Eastman & Burgess on adaptation rates, Kantermann on chronotype, Burke on caffeine pharmacokinetics. Every rule (R1–R13) and every constant traces back to a specific paper you can read.

The full rule book and citation index live at /science— source code, rules, and references all public.

Timeshifter is proprietary — you trust the result because they say so. Longway publishes every rule, every citation, and every constant; you can read the algorithm and the science behind it on /science.

We also run an automated calibration pass that scans new chronobiology research and re-fits parameters when fresh evidence lands — so the protocol drifts forward with the literature, not stuck where it was the day it shipped (see latest calibration). And the plan is free.

For trips under three nights with a magnitude under ~3 hours, Longway will deliberately decline to generate an adaptation plan — adapting your clock costs more sleep than the jet lag itself. The right move is to stay on home time: keep your usual sleep window, drink coffee on your home schedule, and you'll be back home before the lag would have set in.

Eastman & Burgess, 2009.

Real travel comes with surprises: a forgotten melatonin dose, a 2am wedding on D+2, a flight delayed by a day. The free plan is static — it tells you the optimal path, not what to do when you've already left it.

The paid tier opens an AI chat grounded in the same algorithm and literature: ask “I missed last night's dose, what's tonight's move?” or “I have a 7am meeting on D+1 — can I still bank sleep?” and get a re-derived plan in seconds. $2 per trip.

Three things:

• AI adaptation chat. Ask the algorithm anything mid-trip and get a re-derived plan grounded in the same rules and citations. “I'm wide awake at 3am — should I just stay up?”, “I have a long lunch on D+2 — does that break anything?”
• Calendar export (.ics). The high-leverage actions — caffeine cutoffs, melatonin doses, the sleep-bank night, in-flight sleep blocks — land in your phone calendar with timezone-correct alerts. One tap to delete the whole calendar after the trip.
• Wearable-aware re-shaping (coming with Garmin / Oura / Whoop / Apple Health). The protocol responds to your actual sleep score, HRV, and recovery — not just the inputs you typed in.

Generated plans are stored in our database under an anonymous slug so the URL keeps working when you share or revisit it. We don't collect names, emails, accounts, or any identifying metadata — there is no login. Plan inputs (route, dates, chronotype) are kept inside the plan record only; no analytics or third-party trackers run on the page today.