和音クエスト
A card-battle RPG that naturally teaches chord basics through gameplay
Download on the App StoreWhat is Chord Quest?
Chord Quest is a music learning app that naturally teaches chord basics through a card-battle RPG. Embark on an adventure to resolve disharmony among monsters of the 12 keys by creating the right chords. Players receive note cards and build intervals and chords to attack — the better the harmony, the greater the damage.
- Turn-based card battle — build chords from note cards in your hand to attack
- Training sessions — a sage guides you through intervals and chord building before each battle
- 5-chapter curriculum — progress from thirds to triads, 7th, dim, and aug chords
- Boss battles — special encounters with key-change mechanics that test your overall knowledge


What You Learn
| Ch.1 Thirds | Distinguish major and minor thirds. Discover that combining two notes creates meaning. |
| Ch.2 Triads | Major vs. minor chords. Feel how three notes complete a chord. |
| Ch.3 Seventh | Introduction to seventh chords. Experience how adding one note changes the character. |
| Ch.4 Diminished | Learn the unstable sound and special role of diminished chords. |
| Ch.5 Augmented | The expanding sound of augmented chords and when to use them beyond ordinary chords. |
Free / Full Version
| Free | Full | |
|---|---|---|
| Chapter 1 (Thirds) | ○ | ○ |
| Chapter 2 (Triads) | ○ | ○ |
| Chapter 3 (Seventh) | — | ○ |
| Chapter 4 (Diminished) | — | ○ |
| Chapter 5 (Augmented) | — | ○ |
Chapters 1 and 2 are free to play. Upgrade to the full version to unlock all 5 chapters permanently. No subscriptions or additional charges.
FAQ
Supports iPhone / iPad running iOS 15 or later.
Game data is stored only on the device. No data is sent to external servers. Uninstalling the app deletes all data.
Yes. Before each battle, a sage guides you through intervals and chord building in an interactive tutorial, so anyone can enjoy the game.
If you change devices or reinstall the app, restore your purchase from the settings screen. You must be signed in with the same Apple ID.