David Kieffer
Zef is estimated to make < $5k per month from < 5k downloads / mo, tracked daily on Peekly.
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 o
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Rating & reviews
20 reviews
6 Jul → 17 Jul · best #50
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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
Rating & reviews
20 reviews
Monetization
Free
No in-app purchases detected
Similar apps
What's new
- fix pump detection - improve jump algo – fix session state calculation
How much does Zef make?
Zef is estimated to make < $5k per month, according to Peekly's daily tracking.
How many downloads does Zef have?
Zef has an estimated < 5k downloads / mo on the App Store.
Is Zef free?
Zef is free to download.
What is Zef's rating?
Zef has a rating of 4.8 out of 5, based on 20 reviews.
Publisher
David Kieffer
Category
Sports
Compatibility
16.0
Size
42 MB
Rating
4+
Price
Free
Released
—
Last update
Jun 29, 2026
Languages
1 available
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