# 安全员练题狗 vs 汪德富背单词

The clearest difference is update cadence: 汪德富背单词 at every 3 weeks against 安全员练题狗's every 6 months. 安全员练题狗's advantage is iOS requirement (10.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 安全员练题狗 sells 9 one-off in-app purchases and 汪德富背单词 sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

安全员练题狗 ships an update every 6 months, 汪德富背单词 every 3 weeks. The most recent releases landed on November 3, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | 安全员练题狗 | 汪德富背单词 |
| --- | --- | --- |
| 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 6 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 118 MB | 18 MB |
| Requires iOS | **10.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [重庆知典科技有限公司](https://appshunter.io/developer/1030641480) | [毅 林](https://appshunter.io/developer/375935497) |

## What reviewers say

### 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 |


### 汪德富背单词

[App page](https://appshunter.io/ios/app/id6755996675)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 6元400积分 | $0.99 | one-time |
| 28元2000积分 | $3.99 | one-time |
| 68元5000积分 | $9.99 | one-time |
| 128元10000积分 | $19.99 | one-time |


## Frequently asked questions

### Is 安全员练题狗 free?

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

### Is 汪德富背单词 free?

汪德富背单词 is free to download, with in-app purchases available.

### Do 安全员练题狗 or 汪德富背单词 have ads?

Neither 安全员练题狗 nor 汪德富背单词 shows ads.

### Which is updated more often, 安全员练题狗 or 汪德富背单词?

安全员练题狗 ships an update every 6 months, and 汪德富背单词 every 3 weeks. Most recently, 安全员练题狗 was updated on November 3, 2026 and 汪德富背单词 on October 1, 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.*