Doesn't Work
There's a glitch. I select the car (from a choice of 1) and track (ditto) then it thinks for a while and kicks me back to my home screen. Either do something about it or remove it from the App Store.
Not enough ratings yet to assess M.
M-Acceleration appears to be a legitimate app. AppsHunter Legitimacy Score for M is 80/100.
Based on 80 of 100 points across 7 verification signals from App Store and developer data.