About vertical speed, it can be approximated with math. The more satellites being used, the more accurate calculations will be.
Ski Traxx claims to use special algorithms for accurate readings. I'm gonna take their word for it.
We already know the horizontal speed was pretty spot on when we did that car test Sam.
Also, that other app I showed you that places your trail on the ski resort map was pretty accurate about my tracks. It was even showing the little dips in slope I was hitting I noticed. I'd have to see it in real time though. Maybe it tells the time of my run too. I should stop watch myself and run that app as well.
If it's not accounting for vertical, there should be discrepancies between my stop watch and the app tracking the time of my run.
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