# Zef — Riding sports social tracking > Social tracking app for nautical and other sports, with race organization and jump analysis. (iPhone/iPad app by David Kieffer.) - Source: https://appshunter.io/ios/app/zef/id1447673572 (this page in markdown: same URL + `.md`) - Developer: [David Kieffer](https://appshunter.io/developer/1341935892) - Category: Sports, Navigation - Price: Free with in-app purchases (on sale, was $24.99) - Rating: 4.60/5 from 41 App Store ratings · 43 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 43 MB - Languages: American English - Released: 2019-06-05 - Data updated: 2026-09-03 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/zef/id1447673572/reviews.md ## What is Zef? 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 ## Key features - Race organization and championship management - Jump height estimation using drone technology - Support for a wide range of sports - GPX file import from watches - Health app integration - Social feed for friends and spots - Live tracking and notifications ## Pricing and in-app purchases Base price: Free. **Subscriptions** | Subscription | Price | Period | | --- | --- | --- | | Premium for one month | $6.99 | per month | | Summit for one year | $26.99 | per year | | Premium for one year | $34.99 | per year | ## Recent user reviews (10 of 43) All indexed reviews: https://appshunter.io/ios/app/zef/id1447673572/reviews.md ### 5/5 — I like it *2026-01-13* Nice app, hope will be used by more people ### 5/5 — Top pour progresser *2026-01-09* Une appli incontournable pour suivre mes progrès en pumping foil ! Ultra motivante pour visualiser sa progression et analyser l'impact de son matériel grâce à l'historique des données. Couplée à ma montre Garmin et à l'abonnement Summit, c'est un combo parfait pour booster mes sessions et atteindre mes objectifs. Je recommande à 100 %! ### 5/5 — Top *2025-09-09, version 2.8.4* Top appli et developpeur réactif bravo ! ### 5/5 — Incontournable si vous faites du foil !!! *2025-05-02* La première application communautaire pour le Foil : un véritable réseau social pour partager ses sessions et trouver des spots, que ce soit en kitefoil, en wingfoil, en pumpfoil, etc. Elle est adaptée à toutes les disciplines du Foil sur l’eau. Zef a toujours évolué en fonction des avancées du Foil. Il est aujourd’hui incontournable, que vous ayez une iWatch ou une Garmin, de ne pas passer à côté. Bravo pour cette super application ! je ne peux plus m’en passer ### 5/5 — Top appli *2025-04-07* Permet de voir les spots ou les gens naviguent et de te faire une base de données de tes navigation d étalonner tes vitesses avec tes potes … Et maintenant avec le pump de te faire des parcours chronos! ### 5/5 — I love Zef is super useful for wing and kite. *2024-11-27, version 2.7.1* Very useful app. ### 5/5 — Excellent *2024-09-04* Super application qui fonctionne parfaitement bien, en particulier avec l'applewatch. Je m'en sers en cata pour la trace et les polaires, en doublon avec un speedo marin. ### 5/5 — Super appli *2024-07-23* Appli au top pour conserver une trace de tes sessions et surtout progresser. Pour ne rien gâcher, en cas de pepin - bug (ça arrive rarement ) on est dépanné très rapidement. Que demander de plus ? ### 5/5 — Très bonne application mais ne semble pas compatible avec iOS 17.4.1 ! *2024-03-23* Ne fonctionne plus sur mon iPhone SE depuis le passage à iOS 17.4.1 **Developer response:** Bonjour, quel problème rencontrez vous ? ### 5/5 — Best App to track your fun on water *2024-03-17, version 2.6.4* Tried a couple apps but they are not as good as Zef for providing data and tracking my surfing wingfoiling at different locations around the world. ## Frequently asked questions about Zef ### What sports can I track with Zef? Zef supports a wide array of sports including Sailing, KiteSurfing, WindSurfing, SnowKiting, Landkiting, Paddling, WindFoiling, KiteFoiling, SupFoiling, WingFoiling, Cross country skiing, Skating, Kayaking, Surfing, Bike, Electric Bike, Wakeboard, PUMPING, and any other sport that can be tagged. You can also import GPX files from your watch. ### How does Zef estimate jump height? Zef uses an algorithm derived from drone technology to estimate your jump height. You can use your Apple Watch or iPhone to record your jumps, and the app will automatically calculate the height. ### Can I organize races with Zef? Yes, Zef is designed to organize race championships for clubs or training. You can create private races for personal rankings or public races to compete with other users. Race creation involves placing a starting line and buoys on the map. ### Does Zef have a social component? Zef features a social aspect where you can see riders, sessions, and spots around your location via the Wall view. You can follow friends and receive notifications when they are riding, with their sessions displayed live on a map. ### What are the subscription options for Zef? Zef offers several subscription plans: Premium for one month at $6.99 (with a 7-day free trial), Summit for one year at $26.99, and Premium for one year at $34.99. ### Is Zef available on multiple devices? Zef is supported on Mac, Apple Watch, iPhone, and iPad, allowing you to track your sessions across your preferred devices. ### How often is Zef updated? The latest version of Zef is 2.8.5, and it was last updated on January 10, 2026. This indicates a recent and active development cycle for the application. ### What is the user rating for Zef? Zef has a strong user rating of 4.6 stars based on 38 ratings, suggesting a high level of user satisfaction with the app's features and performance. ## Version history (last 5 releases) ### 2.8.7 — 2026-08-27 bug fix ### 2.8.6 — 2026-06-29 - fix pump detection - improve jump algo – fix session state calculation ### 2.8.5 — 2026-01-10 IOS 26 support & fix ### 2.8.2 — 2025-05-27 Bug fix on gps filtering ### 2.8.1 — 2025-05-12 improve gps acquisition &bug fix ## Apps similar to Zef | App | Rating | Price | Category | | --- | --- | --- | --- | | [DUOTONE Wing Academy](https://appshunter.io/ios/app/duotone-wing-academy/id1580562890) | 4.8 (152) | Free | Sports | | [Hoolan: Kite Wingfoil Windsurf](https://appshunter.io/ios/app/hoolan-kite-wingfoil-windsurf/id1639913635) | 4.9 (70) | Free | Sports | | [KiteRadar](https://appshunter.io/ios/app/kiteradar/id1574812675) | 3.7 (3) | Free | Sports | | [DUOTONE Kiteboarding Academy](https://appshunter.io/ios/app/duotone-kiteboarding-academy/id1468791738) | 4.9 (330) | Free | Sports | | [Sailmon: Sailing app](https://appshunter.io/ios/app/sailmon-sailing-app/id1366325024) | 3.0 (2) | Free | Sports | | [Chair Workout: Senior Workout](https://appshunter.io/ios/app/chair-workout-senior-workout/id6746165074) | 4.6 (215) | Free | Sports | ## Related topics [daniel hoefer](https://appshunter.io/ios/topics/daniel-hoefer) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-03.*