Cadence data not read from FIT or written to GPX

[routeconverter]

Hi PHarRut,
I've double checked your file and the source code and in fact, RouteConverter does not process cadence anywhere – which I forgot over the years. Pressure, Temperature, Heartbeat is processed and cadence not. And the reason is pretty simple: there is no data field in GPX for cadence.

So whatever software you've used that could read cadence from GPX – I wonder what it was, must use extensions of GPX to read cadence data