# 掌上唢呐 vs PPM系统

The clearest difference is in-app purchases: PPM系统 at none against 掌上唢呐's 3. PPM系统 also leads on update cadence (every 9 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 掌上唢呐 sells 3 one-off in-app purchases. PPM系统 asks for nothing beyond the download.

掌上唢呐 ships an update every 3 weeks, PPM系统 every 9 days. The most recent releases landed on October 19, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | 掌上唢呐 | PPM系统 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 52.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Size | 107 MB | 120 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [鑫磊 张](https://appshunter.io/developer/1051215758) | [飞虎 官](https://appshunter.io/developer/1489124008) |

## What reviewers say

### 掌上唢呐

[App page](https://appshunter.io/ios/app/id1182217873)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 四孔唢呐 | $0.99 | one-time |
| 六孔唢呐 | $2.99 | one-time |
| 八孔唢呐 | $3.99 | one-time |


### PPM系统

[App page](https://appshunter.io/ios/app/ppm/id1489124009)

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

**In-app purchases:** none


## Frequently asked questions

### Is 掌上唢呐 free?

掌上唢呐 is free to download, with in-app purchases available.

### Is PPM系统 free?

PPM系统 is free to download, with no in-app purchases.

### Do 掌上唢呐 or PPM系统 have ads?

Neither 掌上唢呐 nor PPM系统 shows ads.

### Which is updated more often, 掌上唢呐 or PPM系统?

掌上唢呐 ships an update every 3 weeks, and PPM系统 every 9 days. Most recently, 掌上唢呐 was updated on October 19, 2026 and PPM系统 on October 14, 2026.

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