# 易云网校 vs 注册安全工程师小牛题库

The clearest difference is in-app purchases: 注册安全工程师小牛题库 at none against 易云网校's 1. 易云网校's advantage is device support and iOS requirement (11.0 vs 13.0). On price there is nothing between them.

Both are free to download. 易云网校 sells 1 one-off in-app purchase. 注册安全工程师小牛题库 asks for nothing beyond the download.

## The numbers

| Metric | 易云网校 | 注册安全工程师小牛题库 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | Every 12 months | — |
| Size | 39 MB | 52 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [菊花 张](https://appshunter.io/developer/1678039299) | [Hangzhou Kexue Technology Co., Ltd.](https://appshunter.io/developer/1556205586) |

## What reviewers say

### 易云网校

[App page](https://appshunter.io/ios/app/id6449328456)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 安全工程师•化工安全•精讲课 | $299.99 | one-time |


### 注册安全工程师小牛题库

[App page](https://appshunter.io/ios/app/24/id6476246149)

**In-app purchases:** none


## Frequently asked questions

### Is 易云网校 free?

易云网校 is free to download, with in-app purchases available.

### Is 注册安全工程师小牛题库 free?

注册安全工程师小牛题库 is free to download, with no in-app purchases.

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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.*