No their app is free. You can access via your phone and on the web. Fyi music control on the Garmin is a bit clunky, but it works.

The 255 is also MIP and is basically the same as the one I have (265). The 265 swapped out the display for an amoled display.

That sounds cool. You’ve got a much higher technical acumen than me.

I think the forerunner 55 is MIP. It’s not a smart watch and it’s their base level running watch. I had one before I upgraded to the 265 and I loved it. Off the top of my head, I know it gives you sleep data, heart rate, data, stress level data, a HRV, VO2 max. Max. Maybe some other things. Along with the standard steps and Miles moved or kilometers moved.

I tried jellyfin but didn’t like it. Currently using emby and it works well.

Garmin allows you to export data to a csv file. I’m not sure if it’s all data because I haven’t used it, but I know it’s simple.