Au xr8 scan how to

[sgj66]

I have been on Facebook to find out what I need but now I'm even more lost
I want to scan as I I have a misfire problem changed the mechanical stuff to no avail
So can someone tell me what dongle I can buy from a shop and the link to the specific forscan download for a android phone
I have no idea about I.T. stuff so assume you you are speaking to a 2 y/o and that's being generous