App does basic things, like... showing base line of the Route 66 but there is a lot of bugs, lack of stability, user friendly GUI is the last thing you can get as well. I'm on Route 66 since a week and trying to use it but mainly it works for me as a... compass just showing main direction. If you try to drive oldes part of the road (1926-1932) there is no way to use it. It's probably good for light trip around base R66 track but not precise navigation. I'll stay with EZ66 and Google.