Predicting next chord based on previous choice from real world examples.
https://www.hooktheory.com/trends

These people had been around for years now and while they "lifetime" option license, their software is web based only. Not a true offline software.

There are a couple of algorithmic "predictive" apps, but based on logic, not real world examples. All others are either web based or iOS.
There was a quite interesting progression library app for android, but developer gone silent for years.

Or how about this, interactive Riemann maps. I found them quite entertaining:
https://lengua.la/hugoriemann/hugo.php?sus&dim

Developer done this as a hobby, never matured to a VST or standalone.