# 文档安全助手 vs 电子签约4.0

The clearest difference is device support: 电子签约4.0 at 3 against 文档安全助手's —. 文档安全助手's advantage is iOS requirement (12.0 vs 15.0). On price 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.

## The numbers

| Metric | 文档安全助手 | 电子签约4.0 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | — | Every 27 months |
| Size | 21 MB | 39 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [FRONTIER TECHNOLOGY CO.,LTD](https://appshunter.io/developer/1133064912) | [Shanghai Genyan Network Technology Co., Ltd.](https://appshunter.io/developer/1108275017) |

## What reviewers say

### 文档安全助手

[App page](https://appshunter.io/ios/app/id1367306094)

**In-app purchases:** none


### 电子签约4.0

[App page](https://appshunter.io/ios/app/40/id1626788054)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 文档安全助手 free?

文档安全助手 is free to download, with no in-app purchases.

### Is 电子签约4.0 free?

电子签约4.0 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.*