Since there are approximately one trillion iPhones in the world and about ten-times as many apps, it's not hard to find a program to suit your needs. But in the automotive sphere, there aren't nearly as many quality applications and even fewer that can deliver the information most gearheads crave. Thankfully, DevToaster has answered the call with Rev, and putting out the 2.0 release of its popular diagnostic and performance program.
Here's another iPhone application that demonstrates that soon there is nothing you won't be able to know if you have just one device. DevToaster has created an app called Rev that reads information straight from the OBD-II port on your car and displays it on your iPhone. When it's fully operational, Rev can display things like vehicle speed, RPM, fuel consumption, calculated engine load, and a host of other parameters. You'll even be able to check and reset engine and error codes.