I was successfully able to connect my Surface Pro to my iPad and iPhone. Unfortunately, there doesnt seem to be any display control as expected. I couldnt do the following: 1. Extend the display or 2. Set the display position.
I could only duplicate the desktop and the iPad position would only be on the right hand side.
Some other issues I found were that the mirrored display seem to lag a bit. In addition, I could not change the resolution. Lastly, the display driver is very buggy.
After an hour of trying to get satisfactory results, I gave up and uninstalled it.
auto-xr about Splashtop Wired XDisplay – Extend & Mirror