Resources for visualizing triad relationships between two chords?
I’m currently working on learning triads, and I’m wondering if there are any apps or websites that visualize the triads of two chords at the same time on the fretboard.
Most tools I’ve found let you display the triads (often separated into root position, 1st inversion, and 2nd inversion) for a single chord. That’s useful for practicing the triad shapes (which I’m getting the hang of now), but what I’m really interested in is understanding how nearby triads relate when moving from one chord to another. Having to swap back and forth between visualizing each chord’s triads when I’m practicing and analyzing is time- and mental-load-consuming.
For example, if I’m playing a progression like C → Dm (or more generally I → ii in any key), I’d like to see the available triads for both chords together so I can explore which shapes are physically close and start developing an intuition for smooth transitions.
I’m not looking for a chord dictionary or a full voice-leading analysis. Just a way to visualize the triads of two chords simultaneously, ideally in a way that isn’t tied to one inversion at a time.
Does anything like this exist? Thanks!