Abstract: An apparatus for managing information regarding an inventory of vehicles on an automobile dealership lot includes vehicle tracking devices installed in the vehicles. The tracking devices utilize a GPS receiver for generating vehicle location data and an accelerometer for generating vehicle motion data. Data from the vehicle tracking devices are received by a central server that uses the data to determine whether a vehicle is on a test drive, the identity of a salesperson who is with the vehicle, and the estimated time that the vehicle will return to the dealership. Preferred embodiments establish a geofence around the dealership location, detect when vehicles exit and reenter the geofence, and communicate the exit/return events back to the central server. The central server communicates the information to smartphones of dealership personnel to indicate availability of a particular vehicle.