# Music Transpose - Key Changer — Change the key of the song

> App to transpose music key and adjust song speed for musicians and learners. (iPhone/iPad app by 同宝 金.)

- Source: https://appshunter.io/ios/app/music-transpose-key-changer/id1620125472 (this page in markdown: same URL + `.md`)
- Developer: [同宝 金](https://appshunter.io/developer/1513125037)
- Category: Music, Utilities
- Price: Free with in-app purchases
- Rating: 4.60/5 from 182 App Store ratings · 35 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 45 MB
- Languages: Danish, Ukrainian, Russian, Croatian, Catalan, Hungarian, Norwegian Bokmål, Indonesian, Turkish, Hebrew and 22 more
- Released: 2022-04-26
- Data updated: 2026-08-28
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/music-transpose-key-changer/id1620125472/reviews.md

## What is Music Transpose?

The Music Transpose app allows for easy transposition and adjustment of the speed of songs.

Features:

1. Supports common audio formats (mp3, m4a, wav, tiff, flac etc.) and video formats (mp4, mov, avi, mpg etc.).

2. Pitch adjustment displays the pitch range and supports color-coded prompts (green, orange and red indicate the impact on sound quality).

3. Supports fine-tuning of pitch in half-tone increments.

4. Speed adjustment is displayed as a multiple and also shows the tempo (BPM).

5. Pitch and speed adjustments are independent of each other.

6. Supports export in multiple formats.


Why use the Music Transpose app?

Adjusting the pitch and speed of music and songs is a common problem in music learning. While professional software can achieve this, it can be complicated to use. The Music Transpose app provides an easy-to-use solution.


Regarding purchasing:

The Music Transpose app is a one-time purchase and will remain valid for life without any additional charges. The app runs locally and does not depend on cloud functionality, so you do not need to worry about the software becoming unavailable due to network issues.



Regarding the trial and full versions:

The trial version limits the length of the files that can be previewed and exported, but all other features are the same as in the full version.



Regarding importing files:

The app provides information on how to import files from other common apps to the Music Transpose app. Other apps can usually share files directly to the Music Transpose app through the share function. You can also use AirDrop to send audio or video files from an Apple computer or an iPhone/iPad to the Music Transpose app.



Common issues and feedback:

"Why does the app say the file is invalid when I try to import it?"
The app checks the validity of imported files. If the app indicates that the file is invalid, you may need to check if the file is damaged and try again. Alternatively, you can convert the file to a common format and then import it.

"Why does the app stop working after the processing circle appears during preview?"
This issue is usually caused by file compatibility. We suggest converting the file to a different format and trying again. If it still does not work, you can send the file to yueyin.music@foxmail.com, and we will try to identify the problem and release a fix as soon as possible.

For any other questions or feedback, please email yueyin.music@foxmail.com or contact us through WeChat (ID: allhealthyand).

## Key features

- Supports common audio/video formats
- Pitch adjustment with visual feedback
- Fine-tune pitch in half-tone steps
- Independent speed and pitch adjustment
- Export in multiple formats
- User-friendly interface

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro - One-Time Purchase | $24.99 | one-time |


## Recent user reviews (10 of 35)

All indexed reviews: https://appshunter.io/ios/app/music-transpose-key-changer/id1620125472/reviews.md

### 5/5 — 小白都能用转调

*2026-05-16*

特别好用，有没有安卓系统的吗？

**Developer response:** 谢谢，暂没有android的，不过有mac OS版本的

### 2/5 — Music Transpose - Key Changer

*2026-04-26*

While I am out of the app, the music stops.

### 1/5 — Doesn’t Work

*2026-03-08*

I paid for the full app and it won’t open anything. The demo song works fine but nothing else imports into the app.

**Developer response:** Hi, sorry for the issue! To restore your purchase:
Use the same Apple ID as your original purchase.
Reinstall the app and try "Restore Purchase".
Re-purchasing is safe (no extra charge).
Email yueyin.music@foxmail.com if it persists.

### 1/5 — .

*2026-01-12*

키가 이상하거나 하지는 않는데 영상 길이 제한이 있는지 몇번했는데 다 중간에 끊긴거로만 추출돼요 제대로 사용을 못하겠어요 영상마다 길이도 다 다르게 끊겨서 끊기는 기준을 모르겠네요

### 4/5 — 挺好用，目前bug是文件不能重命名

*2025-12-26*

这一点需改进

**Developer response:** 收到，谢谢反馈，后续版本改进.

### 1/5 — Useless

*2025-11-10*

Asks payment for first use, garbage

### 2/5 — 内置收费 死贵

*2025-10-14*

垃圾

### 1/5 — 打开就是白屏

*2025-07-31*

好无语啊

### 1/5 — Du vol!

*2025-06-11*

Appli factice, 29,9€ et rien ne fonctionne !!!

### 3/5 — App won’t open now

*2025-05-05*

The app won’t open, screen will be black for almost a minute and then go back to Home Screen. I paid for the full version. It’s an amazing app please fix this bug or glitch. I can’t even use the app now.

## Frequently asked questions about Music Transpose

### What does the Music Transpose app do?

The Music Transpose app allows you to easily change the musical key and adjust the playback speed of songs. It supports a wide range of audio and video file formats, making it versatile for various music learning and practice needs. The app provides visual cues to help you understand the impact of pitch changes on sound quality.

### What are the key features of this app?

Key features include support for common audio and video formats, pitch adjustment with color-coded feedback on sound quality, fine-tuning pitch in half-tone increments, and independent speed adjustment displayed with BPM. You can also export your modified files in multiple formats.

### How much does the Music Transpose app cost?

The app is a one-time purchase and grants you lifetime access without any additional charges. It operates locally on your device, meaning it does not rely on cloud functionality and will remain available even without an internet connection. A trial version is available with limitations on file length for preview and export.

### How do I import files into the app?

You can import files by using the share function from other common apps directly to Music Transpose. Alternatively, you can use AirDrop to send audio or video files from Apple computers or iOS devices to the app. If a file is reported as invalid, ensure it's not damaged or try converting it to a more common format first.

### What if I encounter issues with file processing?

If the app indicates a file is invalid, it might be damaged or in an unsupported format; try converting it to a common format like MP3 or MP4. If the app stops working during processing, it's usually a file compatibility issue. Converting the file to a different format often resolves this. For persistent problems, you can contact the support email provided.

## Version history (last 5 releases)

### 4.4.15 — 2026-04-03

1. Fixed export issue on iOS 26
2. Other bug fixes

### 4.4.14 — 2026-01-20

- 已知问题解决

### 4.4.13 — 2026-01-07

1. Added file renaming feature;
2. Fixed other known issues;

### 4.4.12 — 2024-11-19

Solve known problems

### 4.4.11 — 2024-07-10

Solve known problems

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## More apps by 同宝 金

- [Music Transpose: Key  Changer](https://appshunter.io/ios/app/music-transpose-key-changer/id1618175513)
- [Converter: Audio & Video](https://appshunter.io/ios/app/converter-audio-and-video/id1631254171)
- [Music Backing Tracks](https://appshunter.io/ios/app/music-backing-tracks/id1644383334)
- [PDF File  Convert](https://appshunter.io/ios/app/pdf-file-convert/id1666147516)
- [Guitar Backing](https://appshunter.io/ios/app/guitar-backing/id1669682488)

All apps by 同宝 金: https://appshunter.io/developer/1513125037

## Related topics

[key change](https://appshunter.io/ios/topics/key-change) · [music transpose](https://appshunter.io/ios/topics/music-transpose) · [music key changer](https://appshunter.io/ios/topics/music-key-changer) · [song key changer](https://appshunter.io/ios/topics/song-key-changer) · [music transposer](https://appshunter.io/ios/topics/music-transposer) · [song transposer](https://appshunter.io/ios/topics/song-transposer) · [key changer](https://appshunter.io/ios/topics/key-changer) · [audio pitch changer](https://appshunter.io/ios/topics/audio-pitch-changer) · [pitch shift](https://appshunter.io/ios/topics/pitch-shift) · [transposer pro](https://appshunter.io/ios/topics/transposer-pro) · [chord transposer](https://appshunter.io/ios/topics/chord-transposer) · [song pitch changer](https://appshunter.io/ios/topics/song-pitch-changer)

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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 2026-08-28.*