This article held no surprises for I. I knew the Garmin Vivoactive 3 GPS was pretty accurate. I had clocked it against a car odometer — albeit in the 3.5-mile range, rather than at the marathon distance.
That the Garmin Vivosmart 4 was inaccurate should not be a earth-shattering. It doesn’t have GPS.
That most of the other watches were quite inaccurate too is more of a concern. I owned a Samsung S3 Frontier. That, at the 2-3 mile range, was pretty accurate.
But, this is sobering.
I tested a low-end Fitbit recently and could not believe how inaccurate it was. It was a joke.