POPtimization Inc. releases Circle of Fifths Lite v1.2
iPhone, iPad / Education / Chords and Scales: Circle of Fifths Lite allows you to quickly find the chord family and help you with what chords will work in a song while you are composing music. It's designed to assist you to understand chord progressions, easily convert music into a different key,...
www.440audio.com/en/software/vi72011-POPtimization-Inc-Circle-of-Fifths-Lite/