App frequently crashes and does do a good job with outlier datapoints
I’ve had an overall buggy experience with this app. The app crashes not infrequently and also does a bad job at reporting your GPS speed. I use it while I’m sailing and the GPS speed will frequently drop to zero, or show a much higher value for a second, completely ruining the max speed from having any informational value (I’ll be cruising at 5-6 knots and it will record a momentary max speed of 15 knots). The watch is experience is also horrible, with any notification forcing the app into the background. This makes it useless when I’m single handing my boat without wanting to fiddle around with my watch to relaunch the app after a crash or notification. The heading information offered on the app is often completely wrong. I was originally turned on by the pay once model with this app but the feature set really isn’t there. Save your money and just pay for Waterspeed app and the subscription.