I’m truly impressed - pro version supports renaissance 6 and 8 string G lute right up to baroque lute, and scordatura can be done for an additional fee via customize instruments. Love that there is an intermediate price step between pro and ultimate versions (I need the things in pro, don’t need ultimate yet). Love that it shows either notes or intervals and marks the root in red for easy finding so you can see what your options are to play root or inverted chords, altho you do need to figure out your own fingerings and which notes to play/leave out. Easy to shift between types of chords and big range of chords available for all instruments. Love that it can go from a 4 string ukulele to a 13 course baroque lute. Instruments can be marked as favorites by swiping left on the instrument list so you can get back to your favs quickly - this should be documented in the help file. Marking chords or scales as favorites is obvious via a big star. Guitar and GCEA uke chord chart apps are easy to find but this program is much much more sophisticated than that. Great job!