# 滴滴玩科学 vs 注册安全工程师小牛题库

The clearest difference is device support: 滴滴玩科学 at 3 against 注册安全工程师小牛题库's —. On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | 滴滴玩科学 | 注册安全工程师小牛题库 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | Every 10 months | — |
| Size | 172 MB | 52 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [滴滴学堂](https://appshunter.io/developer/519008298) | [Hangzhou Kexue Technology Co., Ltd.](https://appshunter.io/developer/1556205586) |

## What reviewers say

### 滴滴玩科学

[App page](https://appshunter.io/ios/app/id6447539288)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 滴滴玩科学 free?

滴滴玩科学 is free to download, with no in-app purchases.

### 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.*