ChordFlow: Piano Chord Trainer

Sight-Reading, Improv & MIDI

Free · In‑App Purchases · Designed for iPad. Not verified for macOS.

ChordFlow turns your iPhone or iPad into a chord practice room. Play a chord and see its name instantly, build fluency with three sight-reading modes plus Cross-Key Practice, and improvise over the built-in accompaniment machine. Practice on the touchscreen, or connect a MIDI keyboard or digital piano. REAL-TIME CHORD RECOGNITION • Recognizes 45+ chord types: triads, 6ths, 7ths, 9ths, 11ths, 13ths, sus and added-tone chords • Correctly names inversions and slash chords like Dm/G • A rising waterfall visualizes every note you hold • The sustain pedal (CC 64) is handled separately for sound and for analysis, so holding the pedal never blurs one chord into the next PRACTICE MODES • Zen: no timer. Optional chord-tone hints, plus a grace window for pedal legato • Groove: play on the beat. The metronome keeps time and scores the timing of your first note • Fast: pure reaction. Nail a chord and the next one appears — chase your best BPM • Cross-Key Practice: Transpose and Mixed Keys drills OPTIONAL MIDI KEYBOARD • Every feature works on the on-screen keyboard, which adapts to your device • Plug in a MIDI keyboard and the view expands to all 88 keys — connect or disconnect anytime • Velocity and sustain pedal supported • Prefer the sound of your own instrument? Mute the in-app piano 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 • Create and save your own progressions, or have it draw random chords from qualities you pick • Block or arpeggiated playback, with adjustable tempo, chord duration, bass root, sustain, metronome and loop count • Play along, and colors show which target tones you actually hit TRACK YOUR PROGRESS • Practice calendar with streaks, personal bests for every key, and full session history • 25 achievements covering key mastery, habits, theory and performance • Export and import your data anytime — everything is stored on your own device PRACTICE YOUR WAY • All 12 keys, with 29 chord qualities and inversions configurable per position — major, minor, diminished, augmented, sus, and 7ths through 13ths • Keep drills diatonic, or lift the restriction and combine chords freely • Flexible matching (correct chord tones) or exact matching (bass note included) • Roman or Arabic numerals for scale degrees • 10 languages, with chord and theory terms following each language's own conventions FREE VERSION INCLUDES Chord recognition, free play, all three sight-reading modes, Cross-Key Practice, and the built-in progressions, plus the practice calendar, personal bests and every achievement. PRO UNLOCKS All 12 keys, custom progressions, and the accompaniment machine. Choose a monthly subscription with a free trial, or buy once and keep it for good. GOOD TO KNOW • Works fully offline — no account, no ads, and no practice data ever leaves your device • Landscape orientation, designed for both iPhone and iPad • Made by an indie developer who uses it for his own improv practice. Questions or ideas? Email me — I usually reply the same day Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://flash-artichoke-9fd.notion.site/Privacy-Policy-31a51c4c1e3a800fb537cf8dd494979c

Ratings & Reviews

  • 5.0
    out of 5
    2 Ratings

Custom progressions can now use chromatic-root chords, opening up richer harmony for practice and accompaniment. The Accompaniment Machine now offers five more natural-sounding styles, multiple time signatures, custom timing for each chord, and pause-and-resume playback.

Version 1.1.10

The developer, 泽 眭, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • 泽 眭
    Size
    • 63 MB
    Category
    • Music
    Compatibility
    Requires iOS 17.6 or later.
    • iPhone
      Requires iOS 17.6 or later.
    • iPad
      Requires iPadOS 17.6 or later.
    • Mac
      Requires macOS 14.6 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.3 or later.
    Languages
    English and 9 more
    • English, French, German, Italian, Japanese, Korean, Portuguese, Simplified Chinese, Spanish, Traditional Chinese
    Age Rating
    4+
    In-App Purchases
    Yes
    • ChordFlow Pro (Monthly) $0.99
    • ChordFlow Pro (Lifetime) $9.99
    • Learn More
    Copyright
    • © 2026 zesui
  • Privacy Policy

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