I found this app to work very well outdoors whether it was biking or running. The first time out with version 1.0, I noticed another 2 miles were added onto the trip, and that was in the beginning. Reason: I never let the GPS zero in on me outside before I started tracking. After that day I got V. 1.2I set the GPS to sample at 10 times per min, went outside, created a new trail, after the speed and distance stabilized I hit reset, and finally start. After I finished my 28 mile bike ride, itrail was 99.9% accurate. Tried it again last week on a run, and it recorded perfect again.
A couple of things I would like to see.
A GPS lock indicator would be nice (or accuracy meter) this way I know when I can start my trip with initial perfect accuracy.
I would also like to zoom in and out of the google map when Im completed with my trip.
An easier export function to the online version of Google My Maps
Finally, an app just like MAPS on the iPhone to show your live location on a map, just incase youre lost and need to find which road ahead you need to take.
I am also not sure about these revisions apple is posting. I just had a new update for iTrail today (Aug 17th) it was version 1.3, however I dont see any info on V 1.3, and the developer stated that there were going to be many features added with I do not see.