The expensive part is the hardware device that transmits the OBD-II stream wirelessly. The device plugs into the OBD-II data link connector and broadcasts the information to the iPhone using the industry standard 802.11 Wi-Fi standard.

Rev can monitor, record, and even graph all available OBD-II information in real-time. In addition to OBD-II, Rev uses the iPhone’s built-in technology to provide interesting metrics about your vehicle. These built-in metrics, available without the aid of additional hardware, include:

• Lateral and Forward Acceleration: Graph your cornering, braking and acceleration G-forces.
• GPS Track: Visual track displays your location and acceleration data – see how you are braking and accelerating around corners.

Rev can also perform the standard OBD-II scan tool functions such as checking and clearing stored DTCs.

For more information visit the Devtoaster site at: http://devtoaster.com and/or watch the video: