Thanks. The Companion app never seemed to work on my sandboxed Google Play profile on GrapheneOS however. I’ve since found Golden Cheetah which is a native Linux program and totally free. Zwift raising their price was the final straw for me to move on and I’m grateful for it.
GC works perfectly on Linux Mint with my Garmin USB ANT+ dongle, Garmin heart rate strap, and retains all the functionality with my Zwift Hub trainer if anyone is curious.
I used to have a SanDisk Extreme Portable running Ubuntu. If it was unplugged, my computer would boot Windows and when I plugged in the SSD to USB it would auto boot into Ubuntu.
I have no idea how I did it though.It was my first time using Linux and I followed a guide online.Edit: found the video