This is more or less for the photogs out there. I was just using my IPP alongside my MBP and Lightroom. I mirrored my LR screen to the iPad. I must say while it's usable like that it was also slow and clunky, and, unless I was doing something wrong, I couldn't swipe left to advance the photos to work on them on the iPad. I had to keep going back to the library to get the next photo. That is a huge slowdown. I don't know if an M4 would do better (at least faster).
So, I may try out this app. If anyone has any comparisons or experience to share, I am all ears.