Zef vs Gustly

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

Gustly is a GPS session tracker for windsurfing, kitesurfing, windfoiling, and wingfoiling. Record on your phone or Apple Watch, import sessions from compatible GPS devices, and turn your tracks into useful performance insights. Session Analysis connects your results to the water. Select a speed run to see when it happened on the timeline and where it happened on the route. Scrub the chart and zoom in on the map to explore your session in detail. With Gustly you can: - Record GPS sessions on your phone or Apple Watch - Keep recording an active phone session when the screen is off - Import GPX and FIT files, including Garmin exports - Review 2-second speed, top 10-second runs, distance runs, Alpha 500, endurance results, and available gybe and tack insights - Browse your session history, routes, and totals - Save sessions locally and sync when you’re back online - Export your session data - Use iPad’s larger screen to explore maps, timelines, and results Location access is used to record active GPS sessions. With your permission, Health access supports Apple Watch heart-rate data and workout saving. Gustly is a performance-tracking tool, not a navigation or safety device.