“It is like you’ve made a beautiful and fast car that can’t make left turns” – very well put.

A few years later (it is 2026 now) and it STILL can’t make left turns. As QVox still seems to be the only iOS harmonizer that sounds halfway decent, I must say I’m extremely disappointed. Eventide doesn’t seem to care. And as a programmer, I can say it is simply not true that adding static intervals would require big user interface changes. Just add “static intervals” to the modes and voila. Diatonic harmonization needs more intelligence than that – just add a dumb mode and harmonize regardless of the incoming pitch, what is so difficult about that? All the other harmonizers can do it (but their algorithms suck in comparison so they don’t sound good). I’m sure it would take your programmer not more than an afternoon, maybe just a few minutes