# 工业元数 vs 对钩网

The clearest difference is device support: 工业元数 at 3 against 对钩网's —. On price, in-app purchases and iOS requirement there is nothing between them.

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

## The numbers

| Metric | 工业元数 | 对钩网 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | Monthly | — |
| Size | 69 MB | 22 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 17+ | 4+ |
| Developer | [上电智联科技(江苏)有限公司](https://appshunter.io/developer/1585904658) | [Tianjin YiYunDongLi Network Technology Co., Ltd.](https://appshunter.io/developer/1021605779) |

## What reviewers say

### 工业元数

[App page](https://appshunter.io/ios/app/id1585904656)

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

**In-app purchases:** none


### 对钩网

[App page](https://appshunter.io/ios/app/id6449475365)

**In-app purchases:** none


## Frequently asked questions

### Is 工业元数 free?

工业元数 is free to download, with no in-app purchases.

### Is 对钩网 free?

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

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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.*