I got this one.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
I use it with the torque app for data logging and diagnostics with my 6.0 powerstroke.
I used to use my laptop via my sct programmer and this makes life much easier.
The only thing is I have heard that the ease of hacking into bluetooth and outsiders having the ability to mess with your ecu if left on and unattended. So I just unplug it when not being used.
But I have never had any issue using androids and torque with that piece.