# 8pu vs 键盘移调器

The clearest difference is update cadence: 键盘移调器 at daily against 8pu's every 3 weeks. 8pu's advantage is iOS requirement (15.4 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 8pu sells 2 in-app purchases, starting at $1.99 per month and 键盘移调器 sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

8pu ships an update every 3 weeks, 键盘移调器 daily. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | 8pu | 键盘移调器 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/8pu/id6752315068/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 88.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Free | — |
| Size | 22 MB | 4 MB |
| Requires iOS | **15.4** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Chengdu Zhengzai Technology Co., Ltd.](https://appshunter.io/developer/1572575751) | [宇 曹](https://appshunter.io/developer/6786107047) |

## What reviewers say

### 8pu

[App page](https://appshunter.io/ios/app/8pu/id6752315068)

Create professional-grade sheet music for various instruments and vocal parts. This mobile studio offers advanced editing tools, high-fidelity playback, and flexible export options for musicians of all levels.

**Highlights:** Multi-part editing for choirs and bands, Full-dimension editing (time signature, key, tempo), High-fidelity MIDI playback with multiple instrument sounds, Flexible PDF/PNG export and online sharing, Cloud synchronization for progress saving, Optimized for mobile touch interfaces

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $1.99 | per month |
| Pro | $19.99 | per year |


### 键盘移调器

[App page](https://appshunter.io/ios/app/id6786140909)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Transposer Pro Monthly | $0.99 | per month |


## Frequently asked questions

### Is 8pu free?

8pu is free to download, with in-app purchases available.

### Is 键盘移调器 free?

键盘移调器 is free to download, with in-app purchases available.

### Do 8pu or 键盘移调器 have ads?

Neither 8pu nor 键盘移调器 shows ads.

### Which is updated more often, 8pu or 键盘移调器?

8pu ships an update every 3 weeks, and 键盘移调器 daily. Most recently, 8pu was updated on October 24, 2026 and 键盘移调器 on October 19, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*