The Music Theory and Practice by Musicopoulos App

Today's app is the Music Theory and Practice by Musicopoulos app:

Music Theory and Practice by Musicopoulos (http://www.spartanapps.com/Musicopoulos-Best-Music-Theory-App-for-iPhone-iPad-iPodTouch.html) Combines structured music theory lessons with matching exercises; subjects include: Introduction to Intervals, Introduction to Scales, Circle of Fourths and Fifths, Key Signatures, Diatonic Intervals, Major Chords, Diatonic Intervals Continued, Relative Minor Scale, Inverted Major Chords, Chords Continued, Descending Intervals, Chromatic Intervals, Diatonic Chords, Harmonic Minor Scale, Melodic Minor Scale, Inverted Intervals, Major 7th Chords, Minor 7th Chords, Dominant 7th Chords, Major 6th Chords, Pentatonic Scale, Minor Pentatonic Scale, and Modes; comes with a default piano sample that will help develop ears and musical knowledge; other instrument choices include: Piano, Guitar, Bass Guitar, Violin, Viola, and Cello; understanding music theory helps user become a better musician; (iOS 6.1 or later).