This app plus your ears equals complete freedom in writing music! A comprehensive set of tools for any musician: * Chord Progression: Create beautiful chord progressions with full flexibility - use inversions, sus2, sus4, 7th, 9th, and more. Enjoy live playback as piano or synth, or send MIDI directly to your macOS computer! * MIDI Keyboard: Transform your phone into a MIDI keyboard for your macOS computer (compatible with macOS Catalina and newer). * Note Training: Practice reading notes in both treble and bass clefs. * Chord Training: Help you learn how to calculate chords and progressions. * Voice & Ear Training: Simple, effective tools for voice practice and ear training. Plus, enjoy the macOS version included with your purchase!