Hello everyone,
as a developer of a high-end stopwatch app, I was recently asked by an apparent rally fan (WRC in particular) for a more niche spectator timing app. The app would allow the fan to measure and compare performance of cars right where he was standing during any special stage. Information would include relative performance compared to the first car (likely assuming a set start time gap of say 3 minutes) as well as averages previously observed.

I am wondering: Is this really something that spectators want? There seem to be a few (really crappy, old) apps out there with rather limited capabilities. Do spectators really measure and compare times at their location while the special stage is in progress. How do they do it right now? Aren't there official split times that are broadcasted through an app live already?

Would be great to get some comments. Thanks for any feedback!
Best,
Marc