Rev is an application for the iPhone and iPod Touch that monitors, displays, and records real-time vehicle data. By communicating directly with your vehicle’s ECU via its OBD-II port, Rev is the first iPhone and iPod touch application to give you complete access to everything you want to know about your vehicle.

The above results are obtained on S-Gear
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I bought a ELM327 OBD2-USB interface cable months ago. Today I was hit upon a sudden idea to start playing with it. I managed to find the OBD2 port of my Scirocco and insert the cable into the port. I chose PCMSCAN to connect with the car, because it’s the first one I managed to get working. I was very excited when I saw so many data are successfully retrieved from the car. PCMSCAN has very rich features, including the exciting Drag Strip and Dyno.