---
title: "KeyStaff - Reviews, Revenue and Downloads in Vietnam | Apple App Store"
description: "Level up your note-reading chops with quickfire drills, instant feedback, and a built-in metronome that grooves with every time signature. Practice on letters or piano keys, track your streaks, and le"
---

# KeyStaff — Vietnam
> Learn musical notes

![KeyStaff App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/e2/d4/8d/e2d48dfb-6ac4-6885-38bc-8649edcfe0c9/AppIcon-0-0-1x_U007emarketing-0-8-0-85-220.png/434x0w.png)

**Developer:** [Binh Bui](https://apptail.io/developer/binh-bui-AWNo)
**Category:** Education
**Rating:** 5.0/5 (6 ratings)
**Price:** Free
**Bundle ID:** db99.dev.keystaff
**Store:** Apple App Store
**Country:** Vietnam
**Version:** 1.5.1 (released 2026-06-13)
**Original Release:** 2025-10-15
**Languages:** English, Vietnamese

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/vn/app/app/id6753950371)
**AppTail Page:** [https://apptail.io/app/keystaff-dJvx/vietnam](https://apptail.io/app/keystaff-dJvx/vietnam)

## KeyStaff Description
Level up your note-reading chops with quickfire drills, instant feedback, and a built-in metronome that grooves with every time signature. Practice on letters or piano keys, track your streaks, and learn the theory behind every clef in one spot.

## KeyStaff Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/77/3a/88/773a8896-5593-0d4d-103d-21644c5bc753/02_en_chords.png/1242x2688.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/8a/53/2b/8a532bb1-3a9a-2b49-319d-b664b727236b/01_en_notes.png/1242x2688.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/3f/62/4e/3f624e06-515a-6412-d913-8d239ac9f38c/04_en_vocal.png/1242x2688.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/6a/36/85/6a3685a6-8f16-1bc5-274c-1f63b2eef4bf/05_en_metronome.png/1242x2688.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/e0/f5/5d/e0f55dd5-6e7e-931e-8331-29aaec92ddd4/03_en_ear.png/1242x2688.png)

## KeyStaff Rating Breakdown in Vietnam
- 5 stars: 6 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)

## KeyStaff Reviews in Vietnam

### ***** "From j2team with love ❤️"
G
-- Ania9x, 2025-11-27

### ***** "ok"
quite a simple and easy to use app
-- dunklee69, 2025-10-20

[View all KeyStaff reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)





## KeyStaff Available In
- [Vietnam](https://apptail.io/app/keystaff-dJvx/vietnam)
- [Argentina](https://apptail.io/app/keystaff-dJvx/argentina)

---

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