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Zef

by David Kieffer more by this developer →

#161,068 of 718,701 by ratings on Apple · #3,569 of 20,382 in Sports

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Category: Sports

Description

Zef — Ride. Track. Connect.

Zef is a multi-sport tracking app built for riders, with a strong focus on nautical sports.
Track your sessions, analyze your performance, discover spots, and see your friends live — all in one app.


Key Features

Track your rides
Record your sessions with your iPhone or Apple Watch.
Zef integrates with the Health app and supports GPX imports from most watches.

Advanced performance analytics
Get detailed session stats including speed, distance, duration, speed polar, and health data.
Sessions can be replayed to analyze each maneuver.

Jump analysis
Measure jump height using only your iPhone or Apple Watch.
Powered by algorithms inspired by drone technology.

Races & challenges
Create private or public races for training or competition.
Visual guidance and wind angles are displayed directly on your iPhone or Apple Watch.

Spots & live activity
Discover spots around you and see when riders are active.
Follow spots and get notified when sessions start.

Friends & live tracking
Follow riders by username and get notified when friends go live.
Watch their sessions live on the map and stay connected.


Supported Sports

Sailing, Windsurfing, Kitesurfing, Wingfoil, Kitefoil, Windfoil, SUP Foil, Surfing, Wakeboard,
Kayaking, Paddling, Snowkiting, Landkiting, Cross-country skiing, Skating,
Bike, Electric Bike, Parawingfoil, and more with custom tags.


Apple Ecosystem
• iPhone & Apple Watch support
• Health app integration
• Optimized for the Apple ecosystem


Important

Sessions must be recorded from the ground to be validated.


Legal

Terms of Service
https://zef.watch/terms-and-conditions.html

Privacy Policy
https://zef.watch/privacy-and-security-policy.html

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Growth

Change in ratings, scaled to each window from the real gap between crawls. A window needs a full period of history before it reports anything.

History

Tracking since 09/05/2026. History accumulates as changes are observed — check back soon.