I've not seen it mentioned yet in the discussion, but my preferred open source tool for analysing Garmin FIT files is ActivityLog2[1]. Written in Racket, it pro

I've not seen it mentioned yet in the discussion, but my preferred open source tool for analysing Garmin FIT files is ActivityLog2[1]. Written in Racket, it provides some very nice analysis tools for cycling, running and swimming. Regularly updated and decent blog posts on different aspects by the author. [1] https://github.com/alex-hhh/ActivityLog2 https://github.com/alex-hhh/ActivityLog2