# 安全工程师题库2021 vs 安全工程师快题库

The clearest difference is in-app purchases: 安全工程师快题库 at none against 安全工程师题库2021's 9. 安全工程师快题库 also leads on update cadence (every 3 weeks vs every 13 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 安全工程师题库2021 sells 9 one-off in-app purchases. 安全工程师快题库 asks for nothing beyond the download.

安全工程师题库2021 ships an update every 13 months, 安全工程师快题库 every 3 weeks. The most recent releases landed on September 10, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | 安全工程师题库2021 | 安全工程师快题库 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 weeks** |
| Size | 48 MB | 13 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [盼 朱](https://appshunter.io/developer/1708664205) | [北京环球兴学科技发展有限公司](https://appshunter.io/developer/656528480) |

## What reviewers say

### 安全工程师题库2021

[App page](https://appshunter.io/ios/app/2021/id1580658966)

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP1个月 | $3.99 | one-time |
| VIP9个月 | $4.99 | one-time |
| VIP12个月 | $7.99 | one-time |
| VIP24个月 | $12.99 | one-time |
| 价值98元的课程 | $14.99 | one-time |
| 价值198元的课程 | $29.99 | one-time |
| 价值298元的课程 | $46.99 | one-time |
| 价值388元的课程 | $59.99 | one-time |
| 价值488元的课程 | $74.99 | one-time |


### 安全工程师快题库

[App page](https://appshunter.io/ios/app/id6767442425)

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

**In-app purchases:** none


## Frequently asked questions

### Is 安全工程师题库2021 free?

安全工程师题库2021 is free to download, with in-app purchases available.

### Is 安全工程师快题库 free?

安全工程师快题库 is free to download, with no in-app purchases.

### Do 安全工程师题库2021 or 安全工程师快题库 have ads?

Neither 安全工程师题库2021 nor 安全工程师快题库 shows ads.

### Which is updated more often, 安全工程师题库2021 or 安全工程师快题库?

安全工程师题库2021 ships an update every 13 months, and 安全工程师快题库 every 3 weeks. Most recently, 安全工程师题库2021 was updated on September 10, 2026 and 安全工程师快题库 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.*