Watersports used for dinghy racing
This app is great for tracking your the route you have sailed and speed. Play back is nice to see I also use this for windsurfing, kiting and SUP. I would love a bit more functionality such as tacking angle and real-time speed. The only reason this is not a 5 is that when the Apple Watch runs out of battery during a long day on the water the data is lost rather than stored before the battery runs out and all data is lost.