Take my walk yesterday as an example,
my pedometer said 19.4 miles walked over 5 hoursÂ 22 min’s
Geoff’s GPS said 19.1 miles in 5 hours 10 min’s.
Whether it would be soÂ accurate over the hills I don’t know.
ItÂ has also been discussed hereÂ Â with some interesting opinions.Â