PhaseShift: Jet Lag Planner

Arrive ready to enjoy your trip, not fight your body clock. PhaseShift builds a personal jet lag adjustment schedule from your origin, destination, and travel dates. See when to seek or avoid bright light and when to sleep and wake, from the days before departure through your arrival. KEY FEATURES • Calculates your adjustment direction and estimated duration • Combines pre-trip preparation and post-arrival guidance in one timeline • Daily light exposure, light avoidance, bedtime, and wake-time recommendations • Shows today's actions and overall adjustment progress • Optional local reminders at scheduled times • 12-hour and 24-hour time formats, light and dark appearance • Available in English and Korean • No account required; travel data stays on your device Whether you are preparing for a business trip, a long-haul flight, or an international vacation, PhaseShift helps you start moving your sleep schedule toward local time. PhaseShift does not measure body temperature or your circadian rhythm. Its schedule is an estimate based on general circadian adjustment rates and is not medical diagnosis or treatment advice.