New in 2.5 - Modes can now be seen as relative to the original root and (new) as part of a parallel progression. For example, select C, then minor. From the original “relative” mode, you get Am, the natural minor of C major. In parallel mode (now the default), you will get Cm. This may later be used to implement borrowed chords from other keys.

* Added ukulele samples
* Added major blues and harmonic minor as scale types which can be displayed
* Common Progressions — a new Progression Builder view with common patterns like I-IV-V, I-V-vi-IV, 12-bar blues, ii-V-I, and minor variants. Similar in feel to the existing Chord Builder flow. A library of named progressions (I-IV-V, I-V-vi-IV, 12-bar blues, etc.) that auto-populate the Key Explorer's chord selection for the current key.
* Chord Transition Helper — tap two chords and get common fingering pivot points / suggested fingering paths between them.
* Capo Calculator — enter a Song Key and a preferred Play In key, get the capo fret plus a translated chord chart. A guitarist hears a song, finds out it's in Eb, doesn't want to play all barre chords — the capo tool tells them capo 1, play in D or capo 3, play in C. You'd show the original key, let them pick a target chord-shape key, and it outputs capo fret.
* modal characteristic notes and scale degree labels on the diatonic chord buttons.
* Reverse chord lookup - tap frets on a fretboard diagram and identify what chord it is chromatically, across all 12 roots and all qualities, with no dependency on any selected key.
* Improvements on Melody Builder - to include and suggest several guitar techniques to use as melodies, solo with in the context of the current key

Added an underlying chord reference for the app to define and derive common chords and CAGED shapes

Bug fix to recover the missing enharmonic keys from Circle of 5ths