So in other words if I don't take the time to analyze it while I'm playing it's fine. If I had a caddie, the caddie would be taking the notes. Because the carry distance for say the 9 iron would be the average of the number of times I used the 9 iron, not a single shot. Driver carry I don't care about because I just care about hitting fairway. lol. It's the approach shot distances 140 yds and in or 8 iron to GW. And these would have to be collected over several rounds. Nothing beats on course data.
In that instance it would depend on when you decide to evaluate the data. You could take some notes, like "Swing 1, 7 iron on Hole 1" for each swing for which you record data. You can collect that data all day long, and as long as you don't look at it while you're playing, that is specifically allowed.
So basically it's okay to use it only when practicing on the course not when actually playing a round on the course. Because I do want to get carry distances for my clubs off turf conditions with real balls as opposed to mat conditions with range balls. Unfortunately it won't store tempo data so... it'll be course practice w/o score.