# 注册安全工程师题库 vs GanJiang Timer

The clearest difference is update cadence: GanJiang Timer at every 2 days against 注册安全工程师题库's every 6 months. GanJiang Timer also leads on device support (4 vs 2). 注册安全工程师题库's advantage is iOS requirement (12.0 vs 15.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. 注册安全工程师题库 sells 10 one-off in-app purchases and GanJiang Timer sells 4 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

注册安全工程师题库 ships an update every 6 months, GanJiang Timer every 2 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 注册安全工程师题库 | GanJiang Timer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 days** |
| Size | 88 MB | 53 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 17+ | 4+ |
| Developer | [Changsha Xisai Liman Education Technology Co., Ltd](https://appshunter.io/developer/1466745593) | [显金 王](https://appshunter.io/developer/1896593904) |

## What reviewers say

### 注册安全工程师题库

[App page](https://appshunter.io/ios/app/id1529573709)

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1学币 | $0.99 | one-time |
| 10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 |


### GanJiang Timer

[App page](https://appshunter.io/ios/app/ganjiang-timer/id6798547929)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support, iPhone Duo support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $3.99 | per month |
| Quarterly | $9.99 | per 3 months |
| Semi-Annual | $19.99 | per 6 months |
| Yearly | $29.99 | per year |


## Frequently asked questions

### Is 注册安全工程师题库 free?

注册安全工程师题库 is free to download, with in-app purchases available.

### Is GanJiang Timer free?

GanJiang Timer is free to download, with in-app purchases available.

### Do 注册安全工程师题库 or GanJiang Timer have ads?

Neither 注册安全工程师题库 nor GanJiang Timer shows ads.

### Which is updated more often, 注册安全工程师题库 or GanJiang Timer?

注册安全工程师题库 ships an update every 6 months, and GanJiang Timer every 2 days. Most recently, 注册安全工程师题库 was updated on October 25, 2026 and GanJiang Timer on October 31, 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.*