As @biminiroad says, the major difference between the macOS and iOS versions is related to touch screen vs. keyboard/mouse. I have both versions and tend to use the macOS version for building patches, since I find it easier to edit on the Mac. I have an Air2 and also find that I can run much more complex patches on my iMac. That being said, I often build a patch on the Mac so I can run it on the iPad. At this point the Windows version is lagging behind the others from a feature perspective, so if it’s iPad vs. Windows, I would definitely opt for the iPad version.