Seems like a great thing. :) One question. Are those propellers safe? They are not covered with anything and may potentially hurt owner or other people (face, eyes).
Our purpose is to make a library that could be used by any driver without additional equipment, therefore we work only with the sensors available in a phone. Accelerometer and gyroscope installed in it are not precise enough to track position of car. Wheel rotation can't be measured of course by a phone.
If you mean how measurements of the iphone sensor are close to the real values, we did not test it and we do not have any equipment to perform such tests. For our purposes it's accurate enough.
from sh import ifconfig print(ifconfig("wlan0"))
For shellpy
p`ifconfig wlan