Recently, I came across Mapping Tonal Harmony Pro, an app for MacOS and iOS (iPad). It’s well beyond what most of us are trying to achieve here at PianoGroove, but it seems quite fascinating. I thought I’d post a link here for anyone who might be interested.
Take a look at the videos “Learn What You Can Do in Mapping Tonal Harmony Pro” and "3 Reasons Musicians Avoid Studying Tonal Harmony and . . . " to get an idea of how it works. It seems sort of like iRealPro on steroids, including, among other things, an excellent 700 songs standards list.