# AI外语学习 vs 消防工程师题库2021

The clearest difference is in-app purchases: AI外语学习 at none against 消防工程师题库2021's 9. AI外语学习 also leads on update cadence (fortnightly vs every 36 months) and iOS requirement (9.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. 消防工程师题库2021 sells 9 one-off in-app purchases. AI外语学习 asks for nothing beyond the download.

AI外语学习 ships an update fortnightly, 消防工程师题库2021 every 36 months. The most recent releases landed on October 19, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | AI外语学习 | 消防工程师题库2021 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 36 months |
| Size | 18 MB | 30 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Qi Zhi Technology Co. Ltd](https://appshunter.io/developer/1202526572) | [盼 朱](https://appshunter.io/developer/1708664205) |

## What reviewers say

### AI外语学习

[App page](https://appshunter.io/ios/app/ai/id1457543405)

**Features:** macOS Compatibility

**In-app purchases:** none


### 消防工程师题库2021

[App page](https://appshunter.io/ios/app/2021/id1577317319)

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP1个月 | $2.99 | one-time |
| VIP3个月 | $3.99 | one-time |
| VIP6个月 | $6.99 | one-time |
| VIP12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 AI外语学习 free?

AI外语学习 is free to download, with no in-app purchases.

### Is 消防工程师题库2021 free?

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

### Do AI外语学习 or 消防工程师题库2021 have ads?

Neither AI外语学习 nor 消防工程师题库2021 shows ads.

### Which is updated more often, AI外语学习 or 消防工程师题库2021?

AI外语学习 ships an update fortnightly, and 消防工程师题库2021 every 36 months. Most recently, AI外语学习 was updated on October 19, 2026 and 消防工程师题库2021 on September 23, 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.*