Harmony Keyboard
Just Intonation Trainer
Free · In-App Purchases · Designed for iPad. Not verified for macOS.
Train perfect intonation with just intonation.
Harmony Keyboard is a powerful practice tool designed for musicians who want accurate tuning and beautiful harmony. It helps you hear and practice chords using both just intonation and equal temperament, making it ideal for ensemble rehearsal, wind band practice, choir training, and ear training.
Whether you're a student, performer, or teacher, Harmony Keyboard helps develop a better sense of pitch and harmonic balance.
KEY FEATURES
• Just Intonation & Equal Temperament
Switch between tuning systems to understand how harmony and tuning work in real music.
• Intonation Training
Practice tuning chords and intervals to develop a precise musical ear.
• Instant Transposition
Transpose instantly to any key for flexible practice.
• Hold Function
Sustain notes and chords while listening carefully to intonation and balance.
• Wind Instrument Sounds
Includes sounds such as flute, clarinet, and saxophone for realistic ensemble practice.
• Customizable Tuning
Adjust reference pitch (e.g. A=442Hz) and note name display.
PERFECT FOR
• Wind band practice
• Brass and woodwind players
• Choir rehearsal
• Ear training
• Music students and teachers
Harmony Keyboard is a simple yet powerful tool for musicians who care about tuning, harmony, and musical precision.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
Improved stability and made minor enhancements.
The developer, SINCLAIR SYSTEM, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- SINCLAIR SYSTEM
- Size
- 47.3 MB
- Category
- Music
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Pro Version USD 0.49
- Copyright
- © 2025 SINCLAIR SYSTEM