Undef – AI Trip Planner

Trips, Stops & Itinerary Maker

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

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.

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

The developer, Sebastiano Eugenio Cullemi, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Purchases
    • Location
    • Contact Info
    • User Content
    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Sebastiano Eugenio Cullemi
Size
  • 60.5 MB
Category
  • Travel
Compatibility
Requires iOS 15.1 or later.
  • iPhone
    Requires iOS 15.1 or later.
  • iPod touch
    Requires iOS 15.1 or later.
  • Mac
    Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Location
  • This app may use your location even when it isn’t open, which can decrease device battery life.
Languages
  • English and Italian
Age Rating
4+
In-App Purchases
Yes
  • Undef Pro Yearly $59.99
  • Undef Pro Monthly $7.99
  • Learn More
Copyright
  • © 2026 Sebastiano Cullemi
  • Privacy Policy
  • License Agreement

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