Zeitfarer

Zeitfarer is a circadian planning tool built for airline pilots and flight crews, grounded in published sleep, circadian, and melatonin research rather than rules of thumb. It models how your body clock drifts and recovers across time zones, weighing the rest break you actually get in the bunk or the seat, not just the itinerary on paper. The result is one continuous plan for sleep, naps, light, meals, caffeine, melatonin, and exercise that travels with you from the moment you head out the door, through every leg and layover, until you are back home on your own clock. A transpacific trip can put you many time zones from home, and your body clock can only shift about an hour a day. Left alone, that gap shows up as fatigue on the flight deck, not just a rough night in a hotel. Zeitfarer plans around that operational problem instead of offering generic travel advice. HOW IT WORKS Add your flights. Zeitfarer already knows your home airport, crew base, and typical sleep times from your profile. It builds a full schedule of sleep, naps, light, meals, caffeine, melatonin, and exercise around your actual trip, including commutes, deadheads, and commuter hotels. Log what you actually slept and when you got up, and the rest of the trip re-plans from it. The Now tab follows you through the trip, showing what to do now, what's next, and how long until your next report. BUILT FOR HOW CREWS ACTUALLY OPERATE • Now: where you are in the trip at a glance, with a live countdown to your next report • Trip: the whole trip as a stack of collapsible cards, from the night before you leave, through every flight and layover, to recovery at home • Flights: add, edit, and delete legs, including commutes and deadheads • Settings: home and base airports, typical sleep times, age, get-ready and unwind times, and your caffeine, melatonin, and exercise preferences BUILT FOR THE FLIGHT DECK, NOT THE BOARDING GATE Commuter hotels, deadhead positioning, augmented crews and bunk breaks, and per-leg overrides are modeled natively. A professional tool for professional aviators, not a repackaged travel app with pilot terms bolted on. WHY "ZEITFARER" The name fuses two words. A zeitgeber, German for "time-giver," is chronobiology's term for a cue like light, a meal, or exercise that resets your clock; those cues are exactly what this app schedules. A wayfarer is a traveler who journeys far under their own power. Put them together and you get Zeitfarer: a traveler who works with their time-givers instead of against them. ONE TRIP FREE Your first trip is free. A one-time purchase unlocks every trip after it. YOUR DATA STAYS YOURS Zeitfarer collects nothing. No account, no login, and the plan works entirely offline: everything you enter stays on your device. Buying or restoring the unlock goes through the App Store and is the only thing that needs a connection. A NOTE ON SCOPE Zeitfarer is a planning aid grounded in circadian science, not medical advice. Treat its plan as a well-reasoned starting point and adjust to how your own body responds.