I have an iPhone, and so does my wife, so I ordered the Apps. I like it, and it only runs me about $4/month if you figure out its cost in my lease.
Kinda cool that I can look on my iPhone right now and tell that I have 14.4 gallons left in the tank, 468 miles on the odometer and a range of 348 miles (it takes a reading when it was last unplugged - last night at 6:47 PM in my case).
I am fortunate to have unique press cars delivered weekly, but I own:
'13 Audi Q5 2.0T Quattro 8AT
'86 Porsche 911 Turbo 4MT
Gone, but never forgotten... my E70 X5 35d, E90 335i, E46 330i, E36 328i, E70 X5 3.0si, E53 X5 3.0i.
Read my work as West Coast Editor