OBD2 WI-FI Scanner

If you get the torque PRO app (5 dollars) it works on the Ford diesels well. You can set up with ICP reading as well while driving down road. Neat and I use it on all our cars too. Blue tooth works great and I can run live data as you drive plus clear codes. Yes thiks works on Powerstroke Diesel

Here it is for Android and it works great on my Galaxy S3.
There are others for I Phone

https://play.google.com/store/apps/details?id=org.prowl.torque&hl=en