What AR/Lidar app is this?

Solution 1:

It is the app called "Canvas: Pocket 3D Room Scanner" by Occipital!

Find it on the App Store here:

https://apps.apple.com/us/app/id1514382369

You can watch their marketing video about the app here:

https://www.youtube.com/watch?v=l_kG_kSYFUU

Note that the functionality in the video is only available on the iPhone 12 Pro and the 2020 iPad Pro (the models that have a LIDAR sensor).

And here's their web site clearly referencing that the app was featured in the mentioned Apple Event:

https://occipital.com

"(Featured in Apple Event October 13, 2020)"