Chord Tone Trainer
鳥と遊んで覚えるコードトーン
Only for iPhone
$3.99
iPhone
Learn the notes that make up every diatonic chord while playing with a flock of cute birds. Music theory, in short and friendly drills.
「Chord Tone Trainer is a music theory app that helps you learn diatonic chords naturally by playing with birds.
■ Step 1: Learn the stacked-thirds order
Birds sing along a conveyor belt in stacked-thirds order (C→E→G→B→D→F→A). When a bird turns into a "?", tap its note on the fretboard below to answer. Repeat the pattern and the stacked-thirds order will stick with you.
■ Step 2: Learn the notes of each diatonic chord
Chicks in a nest each show their scale degree. Tap the note matching the hopping chick's degree on the fretboard to feed it. Master the notes of all seven diatonic chords while playing.
■ Who is this for
- Anyone who wants to improvise theoretically on guitar or keyboard
- Anyone who struggles to instantly recall chord tones
- Anyone who wants to learn music theory through play, not dry textbooks
■ Why choose this app
- One-time purchase only. No extra in-app purchases, no ads.
■ From the developer
I built this app because I wanted it myself, while teaching myself guitar. I kept opening theory books to memorize chord tones, but it never really stuck. So instead of forcing myself to study, I aimed for something you could just play with in a spare moment — and before you know it, your grasp of the fretboard and chords has quietly improved.
Available in both English and Japanese.
*This app is optimized exclusively for iPhone.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• Added Japanese as a supported language
• Minor improvements
The developer, Yosuke Takahashi, 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Yosuke Takahashi
- Size
- 55.7 MB
- Category
- Music
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Yosuke Takahashi
