It's called dashcommand and allows you to interact with your car and pull any stats available to the OBD2 port via a special dongle. This is exactly the kind of app that is perfect for the appradio. Check it out.

 

http://itunes.apple.com/us/app/dashcommand-obd-ii-gauge-dashboards/id321293183?mt=8&ls=1

ive had the kiwi wifi dongle that is required to work with the app. i paid over $100 for it. tried it on a 99 infiniti g20, 00' g20, 06 acura tsx, 99 pathfinder and 05 nissan frontier. the wifi dongle sucked, dash command didnt work well but i think it was more the kiwi wifi that was screwy.

 

anyway thats my experience with it, i hope others have a better chance. also, fyi they charge 25% restocking fee, after convincing them that their product was defective and fighting a bit, they waived the 25% but not without a fight.