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App Store Apps > Music > Harmony Keyboard
Harmony Keyboard icon

Harmony Keyboard

by SINCLAIR SYSTEM · Music · Free
On the App Store since August 2025 · Data updated 2026-11-02

Harmony Keyboard is made and published by SINCLAIR SYSTEM. AppBrain is an independent app data site and isn't affiliated with SINCLAIR SYSTEM. The app name, icon, screenshots and description belong to SINCLAIR SYSTEM and are shown as published on the App Store.

AppBrain's verdict

Last updated
October 19, 2026
Size
45.1 MB
Official page on the App Store

User feedback

Ratings and reviews on the App Store

Comments on Harmony Keyboard for iOS

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Store listing

By SINCLAIR SYSTEM, from the App Store
Harmony Keyboard Screenshot 1 of 4
Harmony Keyboard Screenshot 2 of 4
Harmony Keyboard Screenshot 3 of 4
Harmony Keyboard Screenshot 4 of 4
Screenshots by SINCLAIR SYSTEM, from the the App Store listing
Description by SINCLAIR SYSTEM Written by the developer, not by AppBrain. Click to read.
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.
Official page on the App Store Also on Google Play

Safety and technology

Found in the app by AppBrain
Price
Free
App size
45.1 MB
Content rating
Everyone

Technologies used by Harmony Keyboard

Releases

Updates seen on the App Store
Version
1.7.0
Launched
August 2025

No changelog data

Alternatives

Similar apps and more from SINCLAIR SYSTEM

Alternatives to Harmony Keyboard

Tonica - Harmonic training icon Tonica - Harmonic training
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iKoto HD icon iKoto HD
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Rankings

App Store top charts

App Store Rankings for Harmony Keyboard

This app is not ranked

About the app and developer

About Harmony Keyboard

Harmony Keyboard is a music app developed by SINCLAIR SYSTEM.

User Ratings

The app has no ratings yet.

App Information

Harmony Keyboard is freely available from the App Store. The app size is 45.11 MB. The latest version available is 1.7.0. The last update was on October 19, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on the App Store since August 2025.

Developer information for SINCLAIR SYSTEM

SINCLAIR SYSTEM

Address:

Frequently asked questions about Harmony Keyboard

Is Harmony Keyboard free?

Yes. Harmony Keyboard is free on the App Store.

Is Harmony Keyboard still available?

Yes. Harmony Keyboard is on the App Store, and the last update we saw was on October 19, 2026.

How large is Harmony Keyboard?

Harmony Keyboard is 45.11 MB.

Is Harmony Keyboard suitable for children?

App Store rates the content of Harmony Keyboard as suitable for everyone.

Who made Harmony Keyboard?

Harmony Keyboard was developed by SINCLAIR SYSTEM. It is listed in the music category on the App Store.

What are the best alternatives to Harmony Keyboard?

People looking at Harmony Keyboard also look at these music apps: Tonica - Harmonic training, Super Wind Orchestra Piano, Brass Piano, HD-300 Assistant, Temperaments Lite.

Share Harmony Keyboard

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Brass Piano icon Brass Piano
HD-300 Assistant icon HD-300 Assistant
Temperaments Lite icon Temperaments Lite
Brass Bands icon Brass Bands
Pitch 1024 - Watch edit. icon Pitch 1024 - Watch edit.
iKoto HD icon iKoto HD
Overview Alternatives Reviews Rankings Technology
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