# 自在中频电疗仪 vs 工部商书

The clearest difference is update cadence: 工部商书 at fortnightly against 自在中频电疗仪's every 2 months. 工部商书 also leads on iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

自在中频电疗仪 ships an update every 2 months, 工部商书 fortnightly. The most recent releases landed on October 7, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | 自在中频电疗仪 | 工部商书 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Size | 68 MB | 112 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Yancheng YoungBright Technology Co., Ltd](https://appshunter.io/developer/1276437086) | [江苏蒙东软件开发有限公司](https://appshunter.io/developer/1690325798) |

## What reviewers say

### 自在中频电疗仪

[App page](https://appshunter.io/ios/app/id1634362130)

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

**In-app purchases:** none


### 工部商书

[App page](https://appshunter.io/ios/app/id6449733237)

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

**In-app purchases:** none


## Frequently asked questions

### Is 自在中频电疗仪 free?

自在中频电疗仪 is free to download, with no in-app purchases.

### Is 工部商书 free?

工部商书 is free to download, with no in-app purchases.

### Do 自在中频电疗仪 or 工部商书 have ads?

Neither 自在中频电疗仪 nor 工部商书 shows ads.

### Which is updated more often, 自在中频电疗仪 or 工部商书?

自在中频电疗仪 ships an update every 2 months, and 工部商书 fortnightly. Most recently, 自在中频电疗仪 was updated on October 7, 2026 and 工部商书 on September 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.*