I've owned a Polemaster for quite a while now, and recently purchased an ASIAir Pro for the advanced imaging features.
Having the AAP already hooked up, I began using its PA routine rather than bring out my laptop in order to use the Polemaster.
I could never quite get the AAP routine to give me a "dead on" reading, and in fact many of the adjustments I was making while watching the AAP app screen simply weren't making any sense in terms of directional travel, with a continued adjustment in exactly the same direction as the previous adjustment suddenly making the target dash to the other side of the adjustment point on the tablet screen.
So I thought I'd try a direct comparison, at exactly the same time ... of the PA routines between the AAP and the Polemaster.
I set up the Polemaster and got it dead on ... green box over top of rotating circle, something I've done hundreds of times before.
I then disconnected the Polemaster laptop, and ran the PA routine in the AAP ... only to find that the perfectly aligned mount as per the Polemaster PA routine was now reading anything but perfectly aligned on the AAP PA routine.
Based on my guiding graph, the Polemaster routine is the accurate alignment ... and the AAP routine is less accurate, with many more guiding corrections required after doing the AAP PA routine.
Perhaps it's the difference between a plate solve with the camera directly on the RA axis (Polemaster) and a plate solve with the camera actually rotating freely in space (the AAP main camera on your scope).
I'll have to do some more testing, but I don't believe that the AAP PA routine is as accurate as the Polemaster PA routine ... and my guiding graph backs that notion up.