ChordBook Description:

You can identify the guitar and piano chords at a glance after tapping only twice to
search for the chord.
In effect, just by tapping two places, you can identify at a glance every root (C-B) and
their corresponding type ('maj', 'm7', etc). You can find a chord for Piano in 'Piano Mode'
or a chord for guitar in 'Guitar Code'.
Regarding the guitar, by touching the buttons 'Up' and 'Down', you can also see a
different way of pressing the chords. Moreover, by tapping the '#' button, you can get
each sharp chord on the screen.
Both for beginners and advanced users, from now on the portable but heavy Chord
Book becomes unnecessary.

1.0.1 Update Description
[1]Add Creator ID.
[2]Fix "C maj" in GuitarMode.