# Realbook Master — Transpose any music score

> Sheet music app for live musicians to transpose scores instantly to any key. (iPhone/iPad app by Sanghyun Park.)

- Source: https://appshunter.io/ios/app/realbook-master/id6754005659 (this page in markdown: same URL + `.md`)
- Developer: [Sanghyun Park](https://appshunter.io/developer/1846257439)
- Category: Music
- Price: $9.99
- Rating: 1.00/5 from 1 App Store ratings · 8 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.6 · 34 MB
- Languages: American English
- Released: 2025-12-02
- Data updated: 2026-09-05
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/realbook-master/id6754005659/reviews.md

## What is Realbook Master?

The sheet music app that understands real live musicians.
Swipe up or down to change keys on the fly - because the show MUST GO ON!

Built for any musicians who perform live. 
Whether you're on stage, in rehearsal, or playing at church, Realbook Master gives you the instant freedom.



Features :
1) Transpose chords and melodies to all 12 keys by swiping the sheet music or using +/- buttons in the top toolbar
2) Download sheet music from the forum
3) Lyrics On/Off
4) Select transposing instruments (bass clef support)
5) Create and share setlists
6) Export transposed sheet music as PDF
7) MusicXML file support
8) Supports various themes, music fonts, and background modes

Perfect for: 
- Jazz musicians who need quick key changes 
- Wind players tired of transposing manually 
- Church musicians managing large song libraries 
- Bassists who need proper clef and range 
- Any performer who values speed and flexibility on stage

## Key features

- Transpose chords and melodies to all 12 keys
- Download sheet music from forum
- Lyrics On/Off
- Select transposing instruments (bass clef)
- Create and share setlists
- Export transposed sheet music as PDF
- MusicXML file support

## Recent user reviews (8 of 8)

All indexed reviews: https://appshunter.io/ios/app/realbook-master/id6754005659/reviews.md

### 5/5 — 진심 제가써본 리얼북 어플중 최고

*2026-08-26*

재즈하시는 분들 이거 저점매수하세요 지금 이가격에 이정도 퀄리티인게 말이 안됩니다 다른 어플들 많이 다운 받아봤는데 이만한 리얼북 어플 못봤어요 제 학생들에게도 늘 추천합니다!!

### 5/5 — 대박

*2026-08-15*

진짜 어마어마하게 편합니다. 리더긱할때 세션들한테 악보줄때 아이리얼비 코드챠트는 멜로디가 없어 너무 성의없고 옛날 리얼북은 한줄 네마디 단위로 안나눠져 있고 키체인지 할려면 악보 찍어야하는 문제들  싹 해결되네요. 포럼에 준비된 스텐다드 곡들도 많아서 좋아요. 무궁한 발전을 기원합니다. 아이패드용 샀는데 맥에도 호완되고 정말 강추합니다.

### 5/5 — 대박

*2026-08-15*

진짜 어마어마하게 편합니다. 리더긱할때 세션들한테 악보줄때 아이리얼비 코드챠트는 멜로디가 없어 너무 성의없고 옛날 리얼북은 한줄 네마디 단위로 안나눠져 있고 키체인지 할려면 악보 찍어야하는 문제들  싹 해결되네요. 포럼에 준비된 스텐다드 곡들도 많아서 좋아요. 무궁한 발전을 기원합니다. 아이패드용 샀는데 맥에도 호완되고 정말 강추합니다.

### 1/5 — Doesn’t have anything

*2026-05-15*

Waste of money

### 5/5 — Life Savior for Jazz Musicians

*2026-04-21*

Realbooks in 12 keys, this is a dream app

### 5/5 — 맥에 깔아버렸네요

*2026-01-04*

맥에서도 구동되었으면 좋겠어요.

**Developer response:** 피드백 감사드립니다, 다음 업데이트에 반영하도록 하겠습니다! ^^

### 5/5 — Best jazz real book app

*2025-12-17*

This is great jazz realbook app for musicians, specially for vocal. Who wants to change the key and sharing with your band members. You saving a lot of time to writing a transpose chart. Spend more time to work on yourself

### 5/5 — Best of the best of the best

*2025-12-11*

Amzing! So user friendly.

## Frequently asked questions about Realbook Master

### What is Realbook Master?

Realbook Master is a sheet music application designed for live musicians. It allows users to instantly transpose any music score to different keys on the fly, supporting various instruments and offering features for setlist management and PDF export.

### How much does Realbook Master cost?

Realbook Master is available for a one-time purchase price of $9.99. There are no in-app purchases or subscription fees associated with its use.

### Does Realbook Master have ads?

No, Realbook Master does not contain advertisements. It is a paid application designed to provide an uninterrupted user experience for musicians.

### What devices support Realbook Master?

Realbook Master is compatible with Mac, iPhone, and iPad devices. This allows musicians to use the app across their Apple ecosystem.

### How often is Realbook Master updated?

The latest version of Realbook Master is 1.2, which was last updated on February 11, 2026. Updates typically include new features and performance improvements.

### What is the age rating for Realbook Master?

Realbook Master has an age rating of 4+, making it suitable for users of all ages. This indicates no mature content is present in the application.

### Can Realbook Master transpose for different instruments?

Yes, Realbook Master supports transposing instruments, including bass clef. This feature is particularly useful for wind players and bassists who need accurate notation for their specific instruments.

### What do users like about Realbook Master?

Based on its rating of 5.0 stars from 6 ratings, users likely appreciate the app's core functionality of instant transposition, its ease of use for live performance, and its support for various musical needs like different clefs and setlist creation.

## Version history (last 5 releases)

### 1.2.1 — 2026-08-26

Version 1.2.1

This update brings several improvements to make viewing and working with your charts faster and more convenient.

- Easier Real Book transposition
  Tap the Key button next to the instrument selector to open the transpose window and instantly transpose the chart to any key you want. The existing swipe-based step transposition is still available.

- Quick Chord Chart / Lead Sheet mode switching
  Switch between Chord Chart and Lead Sheet modes with a single button.

- Improved annotation tools
  The annotation tools have been upgraded to the same enhanced toolset available in Score Master.

- Improved metronome UI
  The metronome interface has been refined for easier and more intuitive use.

- Adjustable score size
  You can now adjust the display size of the score in Settings.

- Tap to hide the top toolbar
  Enable this option in Settings to **hide or show the top toolbar by tapping the score**.

- Other minor improvements and bug fixes

버전 1.2.1 업데이트

더 빠르고 편리하게 악보를 사용할 수 있도록 여러 기능을 개선했습니다.

- 더 간편해진 리얼북 전조
  악기 선택 오른쪽의 키 버튼을 누르면 전조 창이 열리며, 원하는 키로 한 번에 트랜스포즈할 수 있습니다. 기존의 스와이프 스텝 전조도 계속 사용할 수 있습니다.

- 코드 차트 / 리드싯 모드 전환
  버튼 하나로 코드 차트 모드와 리드싯 모드를 빠르게 전환할 수 있습니다.

- 향상된 필기도구
  필기도구를 Score Master 앱과 동일한 향상된 필기도구로 업그레이드했습니다.

- 메트로놈 UI 개선
  메트로놈을 더 편리하게 사용할 수 있도록 인터페이스를 개선했습니다.

- 악보 크기 조절
  설정에서 원하는 크기로 악보 표시 크기를 조절할 수 있습니다.

- 탭하여 상단 툴바 숨기기
  설정에서 옵션을 활성화하면 악보를 탭하여 상단 툴바를 숨기거나 다시 표시할 수 있습니다.

- 기타 사용성 개선 및 버그 수정

### 1.2 — 2026-02-11

Version 1.2 - Major Update: Annotation Feature

New Feature:
- Annotation Tool: You can now write and draw directly on your sheet music! Perfect for marking fingerings, dynamics, and rehearsal notes.

Improvements:
- Sidebar Performance: Improved sidebar loading speed and responsiveness

Bug Fix:
- Fixed PDF export not working correctly

버전 1.2 - 주요 업데이트: 필기 기능 추가

새로운 기능:
- 필기 도구: 이제 악보에 직접 글씨를 쓰고 그림을 그릴 수 있습니다! 운지법, 셈여림, 연습 노트 등을 표시하기에 완벽합니다.

개선사항:
- 사이드바 성능: 사이드바 로딩 속도와 반응성이 향상되었습니다

버그 수정:
- PDF가 제대로 추출되지 않던 문제를 수정했습니다

### 1.1 — 2026-01-12

Version 1.1 - New Feature & Bug Fix

New Feature:
- Lyrics Toggle Button: Added quick access button to show/hide lyrics in the top toolbar

Bug Fix:
- Fixed m7b5 chords not displaying correctly

버전 1.1 - 새로운 기능 및 버그 수정

새로운 기능:
- 가사 토글 버튼: 상단 툴바에 가사 표시/숨김 버튼이 추가되었습니다

버그 수정:
- m7b5 코드가 제대로 표시되지 않던 문제를 수정했습니다

### 1.0.5 — 2026-01-08

Version 1.0.5 - Now Available on macOS!

New Features:
- macOS Support: Realbook Master is now available on Mac! Enjoy seamless music reading on your desktop.

Bug Fixes:
- Fixed whole rests not displaying correctly in certain measures
- Fixed chords not transposing properly in pickup measures
- Fixed altered chords not displaying correctly

버전 1.0.5 - 이제 macOS 를 지원합니다!

새로운 기능:
- macOS 지원: 이제 Mac에서도 Realbook Master를 사용하실 수 있습니다! 데스크탑에서도 편리하게 악보를 연습하세요.

버그 수정:
- 특정 마디에서 온쉼표가 제대로 표시되지 않던 문제를 수정했습니다
- 못갖춘마디에서 코드가 전조되지 않던 버그를 해결했습니다
- 얼터드 코드가 제대로 표시되지 않던 문제를 수정했습니다

### 1.0.4 — 2026-01-02

Version 1.0.4 - Performance Improvements & New Features

Performance Improvements:
- Now Supports Iphone!
- Significantly faster transposition speed
- Transposition Indicator: Loading indicator now displays during transposition

New Features:
- Sepia Background: Choose between White, Sepia, or Dark backgrounds in Settings
- Music Font Styles: Customize the music notation font style in Settings

Bug Fixes:
- Fixed bug where Cb notes moved down an octave during transposition

버전 1.0.4 - 성능 개선 및 새로운 기능

성능 개선:
- 이제 아이폰을 지원합니다!
- 전조 속도가 대폭 향상되었습니다
- 전조 인디케이터: 전조 중 로딩 인디케이터가 화면에 표시됩니다

새로운 기능:
- Sepia 배경 추가: 설정에서 White, Sepia, Dark 배경 중 선택할 수 있습니다
- 악보 폰트 스타일: 설정에서 악보 폰트 스타일을 변경할 수 있습니다

버그 수정:
- 전조 시 Cb 노트가 한 옥타브 아래로 이동하던 버그를 수정했습니다

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## More apps by Sanghyun Park

- [Score Master: Music PDF Reader](https://appshunter.io/ios/app/score-master-music-pdf-reader/id6769524427)

All apps by Sanghyun Park: https://appshunter.io/developer/1846257439

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-05.*