Nope, although milage will be a bit off as its useong GPS and it depends on how many SATs u have and also the accuracy of the phone?
I find mine can vary 0.1-0.5 of a mile over a 15-20 mile rode but never 2 miles but I only use it for tracking, if opi want truly acuret distance I ipuse cyclo computer.
Don't forget it depends how often the GPS signal is being updated so if its not very often and our at high speed you cover more ground over same update so it dress alone and measures the distance bewptween the two measured points to get distance dome.
If u zoom in on the map of your ride u can see what I mean and how the line is actual a serious a straight lines jhioned up and never curved, so its no a continues signal on GPS its more like on of.
So it doesn't know were u are exactly all the time and this can add up over time?
That's my theory anyways?
So its king of like if the time between signals was say a minute of you went in a straight line the distance would be acuret but u went back and forward I then measures the distance bewtween were u are now and were u were as it doesn't know you have been backward and do reward of that makes any sense?
Although itmdosent take a minuet its more like it updates every second or a few times every second?
Its hard to explain but I know what I mean haha BH it its only a theory.
Also don't forget were you actually are and were GPS thinks you are can be different as its not mill sped GPS which is much more acuret this is only what us public have access to, so again data could be lost there
So between the two I expect it to be out a tiny bit but not 2 hole miles.
Then again I could be compleatly wrong.
But its mind of like resoution think, think of video quality a HD video is easier to watch and understand what is happing compered to VGA quality ...kinda.
OK lll stop rambling now,