On a charity walk that went from one end of the Outer Hebrides to the other a variety of fitness trackers could not decide on  just how far a distance was travelled.  Indeed it quickly became quite obvious that there were discrepancies as at the two hour point in the walk the distance ranged from 5.5 to 9 miles.  There were spots with no cell signal during the trek but more often than not there was a decent signal but yet the errors were not properly corrected.  The Inquirer's experience illustrates that at this time you should not consider your smartwatch part of your emergency gear to be used with dead reckoning and a compass as you could be literally mislead.  For now these devices are fitness trackers for the city and even then you might want to double check those distances if you are on a mission to cover a certain amount of ground.

"An example of some of the wearables present on the trek were the Galaxy Gear Fit, Fitbit Flex, Nike Fuelband, Jawbone Up24, Galaxy Gear 2 Neo and the Pebble watch."

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