As the other poster said, it’s Carv (https://getcarv.com/) . It has helped me a lot to improve technique, I actually learned how to carv in skis, and I’m much more comfortable when going fast (my speed record is now 105 km/hr) . It’s beautiful having objective data to tell if you have improved and what did you improve, as well as what needs more work. For me it was a cheap buy as a private lesson one whole day would go for the price of the device, which I can use the whole season and gives me objective data. Stomp it tutorials in YouTube is also a big help.