The app works pretty well, though its not always trustful (some vehicles not promptly detected, departing vehicles also not always detected). Considering this app is on the app store from long time I would expect more improvements and also new functions implementations such as:
Registering the gps coordinates of the parked vehicle for later help on finding it.
Integration of an interface to command phone and music.
SMS voice narrator.
Automatic driving detection that starts the app when the vehicle starts moving.
IOnRoad is bringing all this to ios very soon, so it would be really time to face the competition!
Marco Garavelli about Augmented Driving, v3.0