https://www.cnet.com/news/smartwatch-step-counter-and-distance-tracker-accuracy/
While the Apple Watch takes the accuracy crown once it's calibrated, it's also
worth saluting the three devices that delivered the most reliable out-of-box
results in our test. If you want to be certain of your exact distance and aren't
interested in calibrating your device, the Garmin
Vivosmart ,
the Samsung
Gear S and
the Garmin
Vivoactive are
your best choices -- for now.