# 工部商书 vs i

The clearest difference is iOS requirement: 工部商书 at 12.0 against i's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

工部商书 ships an update fortnightly, i every 3 weeks. The most recent releases landed on September 14, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | 工部商书 | i |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Size | 112 MB | 80 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [江苏蒙东软件开发有限公司](https://appshunter.io/developer/1690325798) | [Yancheng YoungBright Technology Co., Ltd](https://appshunter.io/developer/1276437086) |

## What reviewers say

### 工部商书

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

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

**In-app purchases:** none


### i

[App page](https://appshunter.io/ios/app/i-massager/id6453696633)

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

**In-app purchases:** none


## Frequently asked questions

### Is 工部商书 free?

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

### Is i free?

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

### Do 工部商书 or i have ads?

Neither 工部商书 nor i shows ads.

### Which is updated more often, 工部商书 or i?

工部商书 ships an update fortnightly, and i every 3 weeks. Most recently, 工部商书 was updated on September 14, 2026 and i on October 5, 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.*