# 易趣幼儿英语4A vs 安全工程师鸣题库

The clearest difference is in-app purchases: 易趣幼儿英语4A at none against 安全工程师鸣题库's 4. 易趣幼儿英语4A also leads on iOS requirement (9.0 vs 16.6). 安全工程师鸣题库's advantage is update cadence (monthly vs every 71 months). On price, ads and device support there is nothing between them.

Both are free to download. 安全工程师鸣题库 sells 4 one-off in-app purchases. 易趣幼儿英语4A asks for nothing beyond the download.

易趣幼儿英语4A ships an update every 71 months, 安全工程师鸣题库 monthly. Both last shipped on October 7, 2026.

## The numbers

| Metric | 易趣幼儿英语4A | 安全工程师鸣题库 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 71 months | **Monthly** |
| Size | 20 MB | 114 MB |
| Requires iOS | **9.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [华文盛世](https://appshunter.io/developer/951674252) | [英杰 邹](https://appshunter.io/developer/1797330502) |

## What reviewers say

### 易趣幼儿英语4A

[App page](https://appshunter.io/ios/app/4a/id1102643138)

**Features:** macOS Compatibility

**In-app purchases:** none


### 安全工程师鸣题库

[App page](https://appshunter.io/ios/app/id6743142946)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 安全工程师1个月会员 | $3.99 | one-time |
| 安全工程师9个月会员 | $4.99 | one-time |
| 安全工程师12个月会员 | $7.99 | one-time |
| 安全工程师24个月会员 | $9.99 | one-time |


## Frequently asked questions

### Is 易趣幼儿英语4A free?

易趣幼儿英语4A is free to download, with no in-app purchases.

### Is 安全工程师鸣题库 free?

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

### Do 易趣幼儿英语4A or 安全工程师鸣题库 have ads?

Neither 易趣幼儿英语4A nor 安全工程师鸣题库 shows ads.

### Which is updated more often, 易趣幼儿英语4A or 安全工程师鸣题库?

易趣幼儿英语4A ships an update every 71 months, and 安全工程师鸣题库 monthly. Most recently, 易趣幼儿英语4A was updated on October 7, 2026 and 安全工程师鸣题库 on October 7, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*