# 引导师 vs 安全工程师题库2021

The clearest difference is update cadence: 引导师 at every 3 months against 安全工程师题库2021's every 13 months. 安全工程师题库2021's advantage is iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 引导师 sells 2 one-off in-app purchases and 安全工程师题库2021 sells 9 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

引导师 ships an update every 3 months, 安全工程师题库2021 every 13 months. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | 引导师 | 安全工程师题库2021 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 13 months |
| Size | 125 MB | 48 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [QGENIUS](https://appshunter.io/developer/1579618031) | [盼 朱](https://appshunter.io/developer/1708664205) |

## What reviewers say

### 引导师

[App page](https://appshunter.io/ios/app/id1519158652)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 培训及引导技术线上学分课程 | $14.99 | one-time |
| 引导艺术线上学分课程 | $46.99 | one-time |


### 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 |


## Frequently asked questions

### Is 引导师 free?

引导师 is free to download, with in-app purchases available.

### 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.

### Do 引导师 or 安全工程师题库2021 have ads?

Neither 引导师 nor 安全工程师题库2021 shows ads.

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

引导师 ships an update every 3 months, and 安全工程师题库2021 every 13 months. Most recently, 引导师 was updated on November 7, 2026 and 安全工程师题库2021 on November 3, 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.*