As of this writing on 8/11/23 the Chord and Scale Finder has made its way onto all the major platforms and has a modest but growing user base. There are free and paid versions in the Apple, Google, Samsung and Amazon stores and a paid version in the Microsoft store. We have incorporated suggestions from our users for features such as the ability to tweak tunings in real time, display modes, superimpose pentatonic and “Blues” scales onto major and minor scales and display diminished chords, augmented chords and shell voicings. There is also a Spanish version with more languages coming soon. The next steps are to come up with some instructional videos that show how to get the most efficient use from the product. We try to keep the free and paid versions in sync but as ~95% of users opt for the free version there is sometimes a lag of a few weeks before new features show up in the paid versions.
Chord and Scale Finder User Guide
Apple Store free Version: 
Paid (ad free) version on Amazon
Free Android version on Amazon
On the Galaxy Store the app is referred to as “The New Chord and Scale Finder”
The App Icon for the free Apple Version (Chord and Scale Finder II)
The links below will lead you to several brief videos explaining how the Chord and Scale Finder works. Anyone interested in further explanations can send an inquiry to csfinder@69thStreetBand.