Jet Lag vs Jet Lag Engine

Arrive Ready, Not Exhausted. Jet Lag is the science-based sleep schedule and circadian rhythm planner for travelers. Reset your body clock for any time zone — combining sunlight cues, light therapy timing, and caffeine windows into a personal flight plan. Whether you're flying for a crucial business meeting or the vacation of a lifetime, our app creates a personalized plan to sync your sleep with your destination. How it works: Enter your departure and arrival cities along with your flight time. Jet Lag analyzes your circadian rhythm and creates a customized adjustment schedule. Key features: • Personalized sleep schedules based on your flight • Light therapy and caffeine intake recommendations • Pre-flight, in-flight, and post-arrival guidance • Multiple time zone calculations • Save your favorite routes Whether you're crossing one time zone or ten, Jet Lag helps you arrive refreshed and ready for what comes next. Terms of Use: https://jetlag-aa5f5.web.app/terms.html Privacy Policy: https://jetlag-aa5f5.web.app/privacy.html

Jet Lag Engine turns a time-zone shift into one practical travel timeline. Enter your itinerary and usual sleep, then see what to do now, what comes next, and why each recommendation exists. The deterministic engine plans useful sleep opportunities, correctly timed light or low-light periods, and optional caffeine cutoffs before planned sleep. Built for real itineraries: • Search 7,884 airports by city or IATA code • Enter each departure and arrival in airport-local time • Add multiple ordered layovers • Choose gradual destination adjustment or staying nearer home time • Mark fixed intervals when sleep is impossible • Record recent sleep and wake times to adjust the estimate • Log coffee for cutoff feedback; melatonin remains record-only • Follow Now and a day-by-day timeline across time zones • Receive optional local notifications with quiet hours • Keep the current plan visible in small and medium widgets • Use a travel-window Live Activity during the journey • Keep trip history, duplicate plans, and export plan data • Works offline with no account, ads, analytics, or subscription Airport search, daylight feasibility, plan generation, notifications, widgets, and Live Activities work on the device. Your information leaves only when you explicitly share an export. Jet Lag Engine estimates body-clock timing from the sleep information you provide. It does not measure biological phase or guarantee alertness or recovery. Guidance is general and educational, not medical advice.