ChordFlow: Piano Chord Trainer

ChordFlow turns your iPhone or iPad into a chord practice room: play a chord and see its name instantly, train with three sight-reading modes, and jam over an accompaniment machine. A MIDI keyboard is optional — the on-screen piano covers the full practice loop.

REAL-TIME CHORD RECOGNITION • 45+ chord types: triads, 6ths, 7ths, 9ths, 11ths, 13ths, sus and added-tone voicings • Inversions and slash chords such as Dm/G are named correctly • A rising waterfall shows every note you are holding • The sustain pedal (CC 64) is handled separately for sound and for analysis, so pedalling never fakes a chord

THREE PRACTICE MODES • Zen: no timer. Optional chord-tone hints, plus a grace window for pedal-legato playing • Groove: play on the beat. The metronome drives the queue and scores the timing of your first note • Fast: pure reaction. Hit the chord and the next one appears — chase your best BPM

MIDI KEYBOARD, IF YOU WANT ONE • Everything works on the on-screen keyboard, which sizes itself to your device • Connect a MIDI keyboard and the view expands to all 88 keys, hot-plug included • Velocity and sustain pedal supported • Optionally mute the in-app piano and hear only your own instrument

ACCOMPANIMENT MACHINE (PRO) • Preset progressions: 1-6-4-5, classic pop (4-5-3-6-2-5-1), canon, pop-rock (6-4-1-5) and more • Build and save your own progressions, or draw random chords from a pool you define • Block or arpeggio playback, with tempo, chord length, bass root, sustain, metronome and loop count • Play along and the colours show which target tones you actually hit

PRACTICE THAT ADDS UP • Practice calendar with streaks, personal bests per key, and full session history • 23 achievements across keys, habits, theory and performance • Export and import your data — everything stays on your device

MAKE IT YOUR OWN • All 12 keys, with 29 chord qualities per position — major, minor, diminished, augmented, sus, 7ths through 13ths • Stay diatonic, or switch that off and combine chords freely • Flexible matching (right chord tones) or exact matching (bass note included) • Roman or Arabic degree notation • 10 languages, with chord and theory terms written the way each language actually writes them

WHAT YOU GET FOR FREE Chord recognition, free play, all three practice modes, the built-in progressions, and every calendar, record and achievement.

WHAT PRO ADDS All 12 keys, your own custom progressions, and the accompaniment machine. Take the monthly subscription with a free trial, or buy it once and keep it for good.

GOOD TO KNOW • Fully offline. No account, no ads, no practice data leaving your device • Landscape app for iPhone and iPad • Built by one developer who plays this stuff himself. Email him with a question or an idea — he usually replies the same day

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