[Nokia user]

Since i am a big trackday driver i am looking for a good app to register and record my laptimes when i am driving different tracks.
So far i have found Track Commander | Windows Phone Apps+Games Store (United States) but i have not yet bought it.
Anyone here who use this app? What are your experiences so far? If you use it, could you please upload a video to youtube?

[philxor]

It looks fairly decent. I actually kept my old iPhone around just so I could use Harrys Lap Timer. I use it with a higher resolution GPS adapter and it's awesome.

[Nokia user]

I have been using Harrys aswell, i hope this works like that. I would love to have a database with tracks but i have not found anything like that.
Development of the app seems to have stopped unfortunately.