Thanks, that's the one I had in mind.....What about the thread that's already here on this site ?
Torque App for OBS Android - PowerStrokeNation : Ford Powerstroke Diesel Forum
I only use it for scanning, as you have to be connected to the truck and it is more clumsy to navigate. There is a video in the other thread on here where MJ (I believe) shows how to connect and run a buzz test. If I think about it while I am at home I will try and find the post number.