Zef

David Kieffer · Sports

4.6 41 ratings Free

Chart standing · US

Not currently charting in this storefront.

What changed · US

Listing changes AppTracker has observed for this app in this storefront — new versions, price moves, rating shifts, and store copy.

Aug 27, 2026
New version 2.8.6 → 2.8.7

bug fix

Aug 26, 2026
Rating ★ 4.6 → 4.61

Price & rating history · US

Reconstructed from the listing changes AppTracker has observed in this storefront, so each line starts at the first change on record.

Average rating history over the observed period. 4.6 4.61 Aug 26 15:40 Aug 27 05:32 Aug 27 19:25 Aug 28 09:18 Aug 28 23:10

Average rating

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About

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

What's new · 2.8.7

bug fix

Details

DeveloperDavid Kieffer
ReleasedJun 2019
UpdatedJun 2026
Version2.8.7
Size44.5 MB
RequiresiOS 16.0 or later
Age rating4+
LanguagesEnglish
PriceFree
Categories SportsNavigation
Bundle IDwatch.zef