# 三类人员题库 vs 注册安全工程师小牛题库

The clearest difference is in-app purchases: 注册安全工程师小牛题库 at none against 三类人员题库's 10. 三类人员题库's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. 三类人员题库 sells 10 one-off in-app purchases. 注册安全工程师小牛题库 asks for nothing beyond the download.

## The numbers

| Metric | 三类人员题库 | 注册安全工程师小牛题库 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | Every 4 months | — |
| Size | 103 MB | 52 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPod** | — |
| Age rating | 17+ | 4+ |
| Developer | [长沙优学互动信息技术有限公司](https://appshunter.io/developer/1247376685) | [Hangzhou Kexue Technology Co., Ltd.](https://appshunter.io/developer/1556205586) |

## What reviewers say

### 三类人员题库

[App page](https://appshunter.io/ios/app/abc/id1433156473)

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 10学币 | $0.99 | one-time |
| 1学币 | $0.99 | one-time |
| 40学币 | $5.99 | one-time |
| 50学币 | $6.99 | one-time |
| 三个月题库 | $11.99 | one-time |
| 三个月找答案+题库 | $14.99 | one-time |
| 100学币 | $14.99 | one-time |
| 120学币 | $17.99 | one-time |
| 150学币 | $19.99 | one-time |
| 300学币 | $39.99 | one-time |


### 注册安全工程师小牛题库

[App page](https://appshunter.io/ios/app/24/id6476246149)

**In-app purchases:** none


## Frequently asked questions

### Is 三类人员题库 free?

三类人员题库 is free to download, with in-app purchases available.

### Is 注册安全工程师小牛题库 free?

注册安全工程师小牛题库 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.*