Harmonize: Ear Trainer & Pitch
DownloadApp details
- Version
- 26.10.4
- Updated
- 16.10.2026
- Category
- Music
- Compatibility
- Android 6.0+
- Package name
com.apppppp.harmonize- Developer
- Toshihiko Arai
- Source
- Official Google Play page
Harmonize: Ear Trainer & Pitch is a specialized Android application designed to help users develop perfect and relative pitch through interactive music games. It is particularly effective for musicians learning the nuances of just intonation, offering a unique training experience that goes beyond standard equal temperament exercises. The app is widely appreciated by a diverse range of users, from casual karaoke enthusiasts seeking better vocal accuracy to professional brass band and orchestra members aiming for precise harmonic alignment in ensemble settings.
The core functionality focuses on training the ear to recognize double-stop notes, where two sounds are played simultaneously. Unlike traditional apps that rely on equal temperament, Harmonize calculates decisions based on just intonation principles. For instance, when matching a major third interval between do and mi, the app recognizes that the frequency ratio is 5/4, resulting in an interval of approximately 386.3 cents.
This differs from the standard 400 cents found in equal temperament, requiring users to adjust their perception and playing by about 14 cents to achieve true harmonic purity. Using the provided piano sound as a reference guide, users are encouraged to match tones by feel rather than strict mechanical tuning. The training process involves a subtle trick where you slightly lose the beat, allowing the correct just interval tone to suddenly become clear and distinct at a specific position.
How to install the app
- Check the version, Android compatibility, developer and source in the app details block.
- Open the Downloads tab and use the official source or an available catalog link.
- Before installing, review app permissions and use only sources you trust.
Frequently asked questions
What is the main difference between Harmonize and other pitch apps?
Harmonize focuses on just intonation rather than equal temperament, helping users learn to hear and produce precise frequency ratios like the 5/4 major third interval.
Who is this app suitable for?
The app is suitable for anyone wanting to improve their pitch, including karaoke singers, brass band members, orchestra players, and music students learning harmony.
What reference tone does the app use for tuning?
The app uses a chord reference tone of A=442 Hz, which is slightly higher than the standard A=440 Hz used in many orchestras, to ensure accurate training results.
How does the app help with double-stop notes?
It plays two sounds simultaneously and calculates the interval based on just intonation, training your ear to recognize the subtle 14-cent difference from equal temperament.
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