What if any appointment that had a location specified we could calculate the road-miles from your office to there, and put that in a report?
A little simpler than doing real vehicle/person tracking, still gets you pretty good data – and would be more realistic for us to quickly build.
Let me know in the comments..Daniel Prince commented
That's a great idea, I would use that for field jobs all the time. Make that integrate into the mobile app and you got something good!