Regular readers know that I am an advocate of tablets for editing photographs.  I have been a Wacom user for a long time, using the Bamboos, a variety of the Intuos and Intuos Pro line as well as two different sizes of the Cintiq.  I have clearly spent more than enough money into this sort of device.  In 2015, I first became aware of an app service called Astropad that would turn your iPad into a working tablet for editing purposes.