ChordScope vs Play Jazz

ChordScope visualizes harmony in real time from MIDI input. Connect a MIDI keyboard or controller and play. ChordScope detects the chord you’re playing and highlights the corresponding notes on a one-octave piano keyboard.  Notes that belong to the chord’s scale are shown clearly, making harmonic relationships easy to understand at a glance. Ideal for musicians, composers, and learners, ChordScope provides immediate visual feedback to help you explore chords and progressions as you play.

Play Jazz turns your iPhone or iPad into an approachable jazz instrument. Choose a sound, start a backing groove, and play notes that fit the current harmony. Features: - Scale-safe keyboard with Home Scale and Chord Scale modes - Jazz chord progressions and backing grooves - Piano, Hammond organ, guitar, brass, and other instrument sounds - Sustain controls and touch-friendly slide playing - Tempo, mix, and three-band EQ controls - No account required Play freely, explore jazz harmony, and build confidence without worrying about wrong notes. The app is free and supported by non-personalized banner advertising.