From one iOS developer to another I gotta say this is an awesome app!
I’ve been doing 3D on and off for years and this is a great way to get into sculpting. As great as Zbrush is being able to do this on an iPad on the go is really a game changer. So much so I just bought an M2 iPad 12.9 just for this app alone.
Not really a requirement but maybe a future option to view your model in AR too (from within the app) would be a nice addition and/or export to USDZ too.