# Keyboard: Harmony Maker

> Practice keyboard with just intonation, transposition, and more

Canonical page: [https://chrome-stats.com/d/com.sinclairsystem.keyboard](https://chrome-stats.com/d/com.sinclairsystem.keyboard)

## Overview

- **ID:** `com.sinclairsystem.keyboard`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** SINCLAIR SYSTEM
- **Category:** MUSIC\_AND\_AUDIO
- **Downloads:** 1,778
- **Version:** 1.6.2
- **Last updated:** 2026-09-12
- **First published:** 2025-08-13
- **Publisher country:** JP
- **Size:** 69 MB
- **Data as of:** 2026-09-20
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.sinclairsystem.keyboard)
- **Website:** [https://sinclair-system.com/](https://sinclair-system.com/)
- **Privacy policy:** [https://sinclair-system.com/privacy.html](https://sinclair-system.com/privacy.html)

## Description

“Keyboard: Harmony Maker” supports both equal temperament and just intonation, with features like transposition and hold for flexible practice.<br>It’s simple yet highly customizable—perfect for wind instruments, vocal training, or ear training across many styles.<br><br>Key Features<br><br>Supports both equal temperament and just intonation<br>Hold function to sustain notes freely<br>Transpose to any key easily<br>Includes a variety of wind instrument sounds such as flute, clarinet, and saxophone

## Rankings

- #987,677 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.INTERNET`
- `android.permission.VIBRATE`
- `android.permission.WAKE_LOCK`
- `com.android.vending.BILLING`
- `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE`
- `com.google.android.gms.permission.AD_ID`
- `com.sinclairsystem.keyboard.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.sinclairsystem.keyboard)