Chord Studio: Piano

Learn Chords and Accompaniment

Free · In‑App Purchases

Build from your first chord to slash chords and extensions with guided courses, ten focused practice areas, an on-screen keyboard, or an external MIDI keyboard. Chord Studio is a practice app designed to help complete beginners who have not yet learned chords accompany freely by reading chord symbols. By working through Beginner, Intermediate, and Advanced Courses in order, you can build your skills step by step: keyboard and chord names, inversions, scales, chord progressions, two-hand playing, quarter-note and eighth-note patterns, broken chords, arpeggios, and accompaniment patterns. Questions you do not pass are automatically returned for review. Basic Practice includes ten named scale types in all 12 tonics. Genre Practice offers representative progressions and scales for J-pop, Rock/J-rock, Anime/Game/Vocaloid, K-pop, Western Pop, Classical, Hip-hop/Rap, Jazz, Enka/Kayōkyoku, and R&B/Soul. Features • On-screen keyboard and external MIDI keyboard input • Automatically progressing courses from beginner through advanced • Ten Basic Practice areas with selectable difficulty • A wide range of chords, including major, minor, seventh, diminished, suspended, augmented, extended, and slash chords • Practice material in all 12 chromatic roots, including sharps and flats • Separate display controls for chord tones, keyboard guides, note names, and piano notation • Metronome with an animated pendulum • Progress tracking through mastery levels • Learning records and practice settings saved on your device All features are available for the first seven days. After the trial, Beginner Course and 01 Chord Practice remain available. Purchase Full Access to unlock Intermediate and Advanced Courses and Basic Practice 02–10. No user registration, ads, or third-party behavioral analytics are used. Learning records and settings are processed on your device and are not collected by the developer.

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Added Genre Practice with named representative progressions and scales for ten genres. Scale Practice now lets you choose from all 12 tonics and ten named scale types. We reorganized practice display controls so the chord name and score are easier to follow. From Practice Results, you can add 0–10 one-time repeats of the same practice. Scores now use fixed multiple rows when space allows, with refined clefs, stems, flags, accidentals, and 4/4 placement. Manual single-chord and two-hand practice now recommends four repetitions.

Version 1.1

The developer, Koji Hasegawa, 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.

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    Accessibility

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    Information

    Seller
    Koji Hasegawa
    Size
    20.5 MB
    Category
    Music
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    Languages
    English and Japanese
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    © 2026 Koji Hasegawa
  • Privacy Policy

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