1,000 ft hill in Suffolk
To be honest I am not bothered what it says about heights and Kcal burned as I know these are inaccurate. Overall distance and time are fine and I find pretty much spot on with what my Holux GPS records.
Ok 50 20ft ones, or move to Cumbria.
The point is a lot of people starting out think phone apps are accurate when in fact very few are, even garmin units have there problems when solely used with gps for recording, small I admit in both cases, but still there, I had my garmin 500 give false max speeds before I got the speed sensor (in fact one track had me jump the best part of a mile and then it took a few plots to get back to where it should have been), and even then I am not totally convinced about the accuracy of a wireless sender unit as there is still a lag, much prefer a wired system, having said that the wired system I had (which I ran along side the garmin till I got the sensor) always showed differences to the garmin solely working on gps, which disappeared when i got the sensor, so I then just started using the garmin, though I suspect still errors in there, though not as great as a system working solely on gps.
This was a track when I used a phone last year.
Still get this with the garmin (though not as often as it happened with the phone, to some extents the unit still needs time to get a proper fix, I usually wait till its below 20ft accuracy and steady at that before I set of, unless I am late.), but at least the speed/distance cad h.r. are as accurate as can be using the system I have.