This might be the single most important resource for musicians, especially self taught musicians who learn and play by ear. I don't know how I made it without the tools in this simple yet powerful app but now that I found it I'm opening up my skill set to new and ascended heights. The wealth of scales available is exhaustive and the song feature is an added bonus. I was looking for an option to play a set of notes and it would tell you what chord it is and which inversion. But I find the challenge of discovering the chord on my own to be a powerful learning experience so in a way I'm happy it's not there. Get the full version if you're serious about your musicianship.
Fixed song chord adding and other rare crashes.