What is the difference between PictureMe,PictureMe Pro and PictureMe3?

PictureMe3 is the Catalina compatible version of PictureMe Pro and requires MacOS 10.15.3 Catalina, which is expected to be released by Apple in Januari. There are four major differences between PictureMe and PictureMe Pro. Only PictureMe Pro offers the following features, aimed at the more professional green screen event photographer; …