I have only used Polycam and it works fine, honestly haven't spent enough time with it to have a very strong opinion yet. Posted a couple scans here, would like to do more but just haven't had the time. From what I have seen, it can do a good job but you need to practice to learn the best techniques for scanning large areas. The first file is just a small bench in the woods on my property. The second was more ambitions, some ruins of a small building from a WW1 era munitions plant. These were done with my iPhone 12 Pro Max, not sure how that might differ from the iPad version.
Ruins at the Atlantic County Park at Estell Manor, NJ. LIDAR scan with an iPhone 12 Pro Max Created with Polycam.ai - Belco Ruins #1 - Download Free 3D model by ostroff
sketchfab.com
Would be interested to hear what others have done with LIDAR. Started a thread on this last year and it got very few responses.