My friend has just bought an obd Bluetooth thingy for his focus st, he has an android based phone so his options for apps are more varied than mine. As I have an iphone I'm limited as to what I can get from the apple store. Dont mind paying for an app if it's good, otherwise I'll try a free one, need something to use with my focus RS. Cheers

 

The android one to have is torque. Not sure if its available for iPhone yet.