ZeF – The session tracker built by and for riders.
From kitesurf to wingfoil, windsurf, pumpfoil, SUP foil or even wakeboard, ZeF helps you track your progress, analyze your performance, and relive your best moments.

Whether you're on the ocean, lake, or training for your next competition — ZeF is your riding journal in your pocket.

🧭 Full session tracking
📊 Automatic stats: jump height, max speed, distance, time, trajectory
📒 Session journal: add personal notes, photos & local weather
🌊 Multisport: kitesurf, foil, wing, SUP, windsurf, pumpfoil, wakeboard, surf...
No matter your level, ZeF gives you clear, reliable insights to grow as a rider.

🤝 Connect with your riding crew
Add friends and follow local riders
Get notifications when others are on the water
Discover nearby spots
Host or join fun regattas and friendly races
ZeF isn’t just a tracker — it’s a community of passionate riders.
⚙️ Easy to use, powerful under the hood
Wind direction auto-detection (with manual override)
Record from your phone or smartwatch (Wear OS)
View session data live or afterward
🪁 Just ride — ZeF takes care of the rest.

🎯 Why choose ZeF?
Build your personal ride logbook
Challenge your friends
Keep track of skills and progress over time
Share and relive your best sessions
🔒 Free, no ads – with optional Premium
ZeF is free to use with no ads.
Upgrade to ZeF Premium to unlock:

Unlimited session history
Advanced stats & analytics
Exclusive features
Support the project made by a small team of riders
📥 Download ZeF and ride smarter
Get the app, create your profile, and track every session like never before.
ZeF is available on Android and compatible with Wear OS smartwatches.

ZeF – Your next-gen ride journal 📲🌊

Compatible with Wear OS.