Apps like Music Theory Companion

Here are some great alternatives to Music Theory Companion by PG App Studio :
Scale, Chord Progressions
Scale, Chord Progressions
★4.6
Musical Chord - Music Theory
Musical Chord - Music Theory
★4.6
MyMusicTheory - music theory
MyMusicTheory - music theory
★4.6
Piano Chord, Scale, Progressio
Piano Chord, Scale, Progressio
★4.7
Music Theory Helper
Music Theory Helper
★4.4
Music Theory Tools: Music Guru
Music Theory Tools: Music Guru
★4.1
Piano Chords and Scales
Piano Chords and Scales
★4.1
Circle of Fifths
Circle of Fifths
★4.9
smart Chords: 40 guitar tools…
smart Chords: 40 guitar tools…
★4.7
Oolimo Guitar Chords
Oolimo Guitar Chords
★4.8
Negative Harmony - Simplified
Negative Harmony - Simplified
★3.5
s.mart UNL:MITED
s.mart UNL:MITED
★5.0
s.mart Circle of Fifths
s.mart Circle of Fifths
★4.6
Chord Progression Master
Chord Progression Master
★4.3
Guitar Fretboard: Scales
Guitar Fretboard: Scales
★4.9
Guitarist's Reference Pro
Guitarist's Reference Pro
★3.4