I think it's funny how most people simply default to (or knee jerk reaction) is that this is "creppy" or "i don't want my gf/bf to follow me", without thinking twice about the possible purpose of application like this.
In my case, I work 100 miles away, I spend one and half hours on the high way every day (one way). This app gives my wife a peace of mind knowing that I'm on my way back or still "moving", and was not one of the 19 cars that was involved in the accident last week which resulted in two death.
Laugh all you want, but I think it's sad people are no longer able to think in other people's situation.
Yeah, because my one statement totally means I can't think about other peoples' perspectives.
I get it, FMF is useful in your case.