Submitted by dman on Sun, 2017-10-08 09:31
Download and try the app "Payver"
It's a dashcam that records your drives and uploads data to (hopefully) help self driving tech. In the lower left corner, it shows your speed - with the phone holder that I use, it sits in a spot I imagine matches that of the m3 center display.
I did a long trip glancing at this rather than the speedometer and got very used to it.