GPS path tracking apps are overreaching

Stumbler

I bought a GPS tracking app that plots my morning walk on the map and shows the distance and time (and many other things). But it overestimates the distance by 10% to 20%. I went to return it, but I learned that the new Market return policy is up to 15 minutes after the download . So I downloaded a high-scoring free app, and used it on my next two walks. Well, this one also reads 10% to 20% high. The walk isn't very long, a bit over 0.7 miles: see my screen name :smileyhappy:

 

I know the distance because I have used a Garmin GPS watch many times to measure it, and I also have used mapping software or Google maps (I forgot which) on my desktop computer to verify the distance.

 

Is it just me? Is there a problem with the GPS on the Droid Incredible or on Android phones in general? Or does it  happen that both apps have a problem and I should try other apps? If it's a problem with the GPS hardware or the OS support of the GPS, is there a work-around, or should I just stick with the Garmin watch?

 

The GPS apps are TripTrack (€1.99) and My Tracks (free). The phone is HTC Incredible.

 

Thanks,

Stumbler

 

 

 

AZSALUKI

well....you have 2 apps that say one thing and 2 other sources that say another (garmin and maps). how do you know that it's not the other 2 sources that are off?