The watch is very inaccurate when running with gps, whether I'm using Strava or Fitbit it is taking the odd 100 metres off my run which is incredibly frustrating. This is on clear sunny days with no cloud cover so there really is no excuse for this. I regularly do Parkrun which is a carefully measured 5k and today for instance it registered as 4.77 km. Any ideas as to why?. I thought I was upgrading when I got the Pixel watch but it's worse than my eighty quid Garmin.
