I just downloaded your iSMARTtrain software, looks good.
I’m using the Polar 725sx, which appears to be compatible, looking at the website.
I got a Polar dongle for data transfer when I bought the 725sx and it comes with a white USB cable. If I read the website correctly, if I use this - Keyspan USA-19HS Serial-USB adaptor - with the Polar dongle, I will be in good shape?
I wanted to check before I spent £31 on the new cable.
Nice looking piece of software, it looks useful to me as I’m using Polar now but also intend to use a PowerTap in a couple of months.