# 三类人员题库 vs 安全员练题狗

The clearest difference is iOS requirement: 安全员练题狗 at 10.0 against 三类人员题库's 12.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 三类人员题库 sells 10 one-off in-app purchases and 安全员练题狗 sells 9 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

三类人员题库 ships an update every 4 months, 安全员练题狗 every 6 months. The most recent releases landed on September 13, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | 三类人员题库 | 安全员练题狗 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/abc/id1587854075/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 90.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 6 months |
| Monetization | — | Free |
| Size | 103 MB | 118 MB |
| Requires iOS | 12.0 | **10.0** |
| Devices | iPhone, iPod | **iPhone, iPad, 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) | [重庆知典科技有限公司](https://appshunter.io/developer/1030641480) |

## 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 |


### 安全员练题狗

[App page](https://appshunter.io/ios/app/abc/id1587854075)

This app helps users prepare for safety officer certification exams (A, B, and C). It offers AI-powered practice questions, analysis of weak areas, and spaced repetition techniques to improve knowledge retention. Access past exams, high-frequency questions, and detailed explanations to study efficiently.

**Highlights:** AI-powered adaptive learning, Chapter-specific practice questions, Past exam papers, High-frequency question analysis, Error correction and consolidation, AI-driven question recommendations, Exam simulation

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 安全员练题狗充值1余额 | $0.99 | one-time |
| 安全员练题狗充值6余额 | $0.99 | one-time |
| 安全员练题狗充值18余额 | $2.99 | one-time |
| 安全员练题狗充值50余额 | $6.99 | one-time |
| 安全员练题狗充值88余额 | $12.99 | one-time |
| 安全员练题狗充值128余额 | $19.99 | one-time |
| 安全员练题狗充值168余额 | $24.99 | one-time |
| 安全员练题狗充值198余额 | $29.99 | one-time |
| 安全员练题狗充值298余额 | $39.99 | one-time |


## 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 安全员练题狗 free?

安全员练题狗 is free to download, with in-app purchases available.

### Do 三类人员题库 or 安全员练题狗 have ads?

Neither 三类人员题库 nor 安全员练题狗 shows ads.

### Which is updated more often, 三类人员题库 or 安全员练题狗?

三类人员题库 ships an update every 4 months, and 安全员练题狗 every 6 months. Most recently, 三类人员题库 was updated on September 13, 2026 and 安全员练题狗 on September 21, 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.*