Great app for Set Theory
This is an excellent tool for quickly obtaining any set and its complement, including Forte names and all transpositions and inversions of a given set. Can be viewed as numbers or as pitch classes.
Of course I have no idea what this is
But it looks interesting. However, if the keyboard is supposed to produce tones, it doesn’t. I have the latest update to iPadOS, running on an iPad Pro 9.7.