I’m looking at the demo and noticed these important scales are missing: Whole Tone (W-W-W…), Dim (W-H-W-H… or H-W-H-W…), Aug (m3-H-m3-H…).
I can imagine it would be a little tricky to define “diatonic” chords from these kinds of scales. So the ability to build custom chord sets within these would be useful.
Modes are great to have, parallel modes, even better. But they presence of all the modes makes the list seem longer than it really is.
I’d love it if Scaler was packed with lots of new scales to try.