# 键盘移调器 — 电子键盘乐器移调助手

> 电子键盘乐器移调助手 (iPhone/iPad app by 宇 曹.)

- Source: https://appshunter.io/ios/app/id6786140909 (this page in markdown: same URL + `.md`)
- Developer: [宇 曹](https://appshunter.io/developer/6786107047)
- Category: Music
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2026-07-20
- Data updated: 2026-08-21
- User reviews in markdown: https://appshunter.io/ios/app/id6786140909/reviews.md

## What is 键盘移调器?

SUBSCRIPTION REQUIRED: Transposer is a free download, but an auto-renewable Transposer Pro subscription (In-App Purchase) is required to access the app’s features. A free trial may be available. Subscription length and price are shown in the app and on the App Store purchase sheet before you confirm. Payment is charged to your Apple ID account at confirmation of purchase. The subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in Settings > Apple ID > Subscriptions.

Transposer is a MIDI transpose utility for electronic keyboards. Connect a compatible keyboard via USB, choose your instrument profile, and reach your target key in one tap.

Features unlocked with Transposer Pro (In-App Purchase):
• One-tap transpose control for live performance
• Support for many popular keyboard models
• Multiple device connection
• Custom presets for songs and keys
• Background MIDI while the screen is locked

Privacy Policy:
https://briancaoyu.github.io/Transposer/privacy.html

Terms of Use (EULA):
https://briancaoyu.github.io/Transposer/terms.html

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Transposer Pro Monthly | $0.99 | per month |



## Version history (last 5 releases)

### 1.0.9 — 2026-08-19

Added Casio product line support in the device list.
Fixed transpose sync for Yamaha Genos / Genos2.

### 1.0.8 — 2026-08-18

Added Korg models: Kross / Kross 2, SV-2 / SV-2S, and Grandstage / Grandstage X.
Fixed transpose sync for Kronos / Kronos 2, Krome / Krome EX, and Nautilus / Nautilus AT.

### 1.0.7 — 2026-08-15

Swiping between score tabs is smoother. Swiping past the last page opens the next score on its first page; swiping past the first page opens the previous score on its last page.
A tab switch only happens when the swipe starts on the first or last page, so mid-score page turns no longer jump to another score by mistake.
Bluetooth page turners (such as AirTurn and PageFlip) are supported: with a score open, the pedal, arrow keys, space, and similar keys turn pages. Pedal direction can be swapped in Settings.
Score gestures: two-finger tap searches/browses the library; three-finger tap shares the current score. These can be turned on or off in Settings.
Device list now includes the Roland FP series: FP-90X / 60X / 30X / 10, FP-90 / 60, and FP-50 / 30 / 7 / 4.
Yamaha arrangers: added support for PSR-A5000; Tyros / PSR-S / PSR-SX now use the same software transpose rules as PSR-SX.

### 1.0.6 — 2026-08-14

What's New in 1.0.6

Added score reading: import PDFs and transpose while you play.

Score library: import, search, playlists, and multiple open tabs
Reader: horizontal/vertical page turns, two-page landscape view, Apple Pencil markup, and full screen
Compact transpose bar at the bottom or side, and it can be collapsed

### 1.0.5 — 2026-08-13

Added two transpose layouts with simplified key names (−12 to +12 v2 and −6 to +6 v2). When selected, transpose buttons, the current key, and related displays use shorter names:

C#, Eb, F#, Ab, Bb

## Related topics

[yamaha flowkey](https://appshunter.io/ios/topics/yamaha-flowkey)

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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 2026-08-21.*