Avion Shift

Land sharp, sleep on time. Avion Shift builds a personalized jet lag plan for every flight — light, sleep, melatonin, caffeine — based on peer-reviewed circadian science.

Jet lag is optional.

Avion Shift builds a personalized circadian schedule for every flight you take. Add a flight, and Avion Shift produces a day-by-day plan covering when to sleep, when to seek bright light, when to avoid it, and when to time melatonin and your last cup of coffee — all calibrated to your sleep schedule, your direction of travel, and the timezones you're crossing.

Most jet lag apps are built around abrupt schedule shifts that nobody can actually follow. Avion Shift is different. Sleep is the anchor — every other recommendation is derived from where your body's primary sleep window should fall, given the destination you're heading to. The result feels livable, not punishing.

WHAT YOU GET

• A complete day-by-day plan from the moment you start preparing until a few days after you land • Sleep windows you can actually follow, with smart placement around flights and layovers • Light exposure and avoidance windows that actually shift your circadian clock • Melatonin and caffeine timing tuned to your dose preferences and sensitivity • Notifications that fire at the right moment, not before • Multi-leg trip support — connections, long layovers, world tours • Home screen widget and Lock Screen Live Activity showing your next action at a glance • Offline-ready: every plan works in airplane mode, because that's where you'll need it

PERSONAL, NOT GENERIC

Onboarding takes about a minute. Tell Avion Shift your typical bedtime and wake time, and you're set. Optionally fine-tune chronotype (morning person, night owl), melatonin dose, caffeine sensitivity, and pre-trip preparation window — every input maps to a peer-reviewed parameter from the circadian research literature.

BUILT ON RESEARCH

Avion Shift's algorithm is grounded in published work from Eastman, Burgess, Khalsa, Czeisler, and others — the same body of evidence that informs clinical chronotherapy. The engine evaluates light and melatonin phase response curves directly and adapts when you skip or move an action.

PRIVACY-FIRST

Your trip data, sleep schedule, and preferences are stored on your device. Sign in with Apple — no email, no password, no tracking. Crash reports are anonymized before leaving your device.

NOT MEDICAL ADVICE

Avion Shift is for general jet lag management in healthy adults. It is not a medical device and is not a substitute for advice from a healthcare provider.