Undef – AI Trip Planner

Plan your trips stop by stop, or let AI do it for you. Itineraries, tracking and stats, all in one app.

Undef is the travel planner that changes the way you plan and live your trips.

Build your itinerary by hand, stop by stop, or let AI generate it for you in seconds, based on your traveler profile, budget and travel style.

PLAN Build your trip day by day. Add stops, schedules, notes and transport. Everything organized, always with you.

LET AI HELP YOU Describe your trip and AI generates a complete itinerary with stops, local highlights and personalized suggestions.

TRACK Enable automatic tracking: Undef marks stops as visited while you explore, even with your phone in your pocket.

RELIVE At the end of your trip, discover your report: stats, expenses, cities visited and your traveler profile that grows with every adventure.

SHARE Create ready-to-share cards: trip cover, day by day, your stats.

Undef is free. Undef Pro unlocks unlimited AI generation, advanced stats and much more.