From Alberto De Bortoli:
iHarmony is a fully complete collection of all the scales, chords and harmonizations you can find in music. It's very common for musicians getting confused about music theory... what notes is G# diminished 7 chord made of? What about the Bebop Dominant scale or worst... what about the harmonization of D# Melodic Minor scale? No more getting annoyed to search the web about the Lydian 7b scale, the Neapolitan scale or the Wholetone scale! iHarmony offers you the most complete set of scales, chords and harmonizations with over than 1500 entries and audio clip! The whole musical harmony always with you on your iPhone, iPod Touch or iPad. You can choose anglo-saxon notation (C, D, E), italian notation (Do, Re, Mi), german notation (C, D, ...H), or french notation (Ut, Re, Mi...).Extremely useful when you write music, before a jam with your band, to do the functional analysis of jazz standards or to do your musical homework. A "must" for every kind of musician!
Virtually every scale you'll ever encounter and nearly every chord you'll need.
Using Roman numerals for intervals is confusing, since they are usually reserved for chords. Use Arabic numerals for intervals. Spell chords the conventional way; i.e. a chord with 1,4,5,b7 is usually spelled C7sus, not Csus7.
Great app - needs some fine tuning to be useful for musicians of all levels of experience.