Chord Studio: Piano is made and published by
Koji Hasegawa.
AppBrain is an independent app data site and isn't affiliated with Koji Hasegawa.
The app name, icon, screenshots and description belong to Koji Hasegawa and are shown as
published on the App Store.
About Chord Studio: Piano
Chord Studio: Piano is a music app developed by Koji Hasegawa.
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App Information
Chord Studio: Piano is freely available from the App Store. The app size is 19.49 MB. The latest version available is 1.0. The last update was on October 8, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on the App Store since October 2026.
Description by Koji Hasegawa(from the App Store)
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.
Features
• On-screen keyboard and external MIDI keyboard input • Automatically progressing courses from beginner through advanced • Nine 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 02–09.
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.
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.