Has anyone found a good OBD2 app for iphone, prefer free. I have an OBD2 Wifi device that use ELM327 and need a good cheap app that shows MPG real time. I really like the idea of using the phone since it is already on the dash. I have tried about 10-15 apps with little or no luck?? I do not mind paying a little, but I want to make sure it does what I want first (demo?).
