iPhone GPS is lame?

I installed Runtastic on my Incredible. It’s a very good running app. Nice Google Maps of your runs, good splits, altitude stats, you can upload to their website and the basic version is free.

So my wife installed it on her brand new iPhone. The app works great. But the GPS is flagrantly off. By about a half a mile per run.

These are runs where we know the real mileage. We can do it on walkjogrun.net to check. And the iPhone is just flat out wrong. The map looks right, but the mileage is wrong.

At least it adds a half mile to the run as opposed to the opposite. Maybe this is all a part of the great Apple user experience…