On device only, no play store, with GrapheneOS.
I am thinking about a Garmin watch and using it with Pulse. My cardio is really bad and it has been starting to cause all sorts of health issues, so I need something to track my heart rate while I go on walks to build my stamina back up so I can start actually working out.
Maybe now would be a good time for me to try then as I just had to do a factory reset a couple of days ago as it was constantly trying to re-pair with the phone over and over. Which was especially annoying as it started doing it during a run!