# 数字图书馆 vs 身份认证验证器大师

The clearest difference is iOS requirement: 数字图书馆 at 9.0 against 身份认证验证器大师's 13. 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.

## The numbers

| Metric | 数字图书馆 | 身份认证验证器大师 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Size | 66 MB | 22 MB |
| Requires iOS | **9.0** | 13 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 17+ |
| Developer | [Beijing Huayue Jiacheng Technology Development Co., Ltd.](https://appshunter.io/developer/1478105989) | [名松 吴](https://appshunter.io/developer/1872459166) |

## What reviewers say

### 数字图书馆

[App page](https://appshunter.io/ios/app/id1308238231)

**In-app purchases:** none


### 身份认证验证器大师

[App page](https://appshunter.io/ios/app/id6774106921)

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

**In-app purchases:** none


## Frequently asked questions

### Is 数字图书馆 free?

数字图书馆 is free to download, with no in-app purchases.

### Is 身份认证验证器大师 free?

身份认证验证器大师 is free to download, with no in-app purchases.

### Do 数字图书馆 or 身份认证验证器大师 have ads?

Neither 数字图书馆 nor 身份认证验证器大师 shows ads.

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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.*