I have been watching the Scaler 3 reveals over the last few weeks - I must say, good work
I realise that these suggestions are far too late for the initial release but please consider them:
A) To me, much of the text seem “marooned” in acres of black space. I did some editing of screenshots and reckon that the text size in many places could be increased by about 30%. Maybe make the Preference Setting range bigger?
B) in the chord rounded rectangles and Circle of 5ths circles, arrange the chord name over 2 lines (and increase the font size) so that the root note is on the upper line and the rest of the name is on the lower line. This would provide mote room for the full chord name.
C) the use of UPPER CASE for Mood names, Mode names etc is a bit “shouty”. Mixed case would be friendlier.
D) lighten up the default text colour, the dull grey can be a bit difficult to read.
E) consider adding a bit more colour to distinguish different elements - I am not sure which ones yet.