Im not sure if this Jeffery Clive is the developer of the QBIKE ANT+ Cycling Training on Raspberry Pi, there are
multiple Jeffery Clive s. But the picture of Jeffery Clive on Strava looks great, so I leave everything at it is.
to build your own open source Garmin connect mobile & Garmin watch system . But for the Linux PinePhone or for an open source Linux watch, Bluetooth low energy sensors might be better, since they do not require an ANT+ stick.