# 数学小博士之初试牛刀 vs 创视界

The clearest difference is in-app purchases: 数学小博士之初试牛刀 at none against 创视界's 3. 数学小博士之初试牛刀 also leads on device support. On price and iOS requirement there is nothing between them.

Both are free to download. 创视界 sells 3 in-app purchases, starting at $3.99 per month. 数学小博士之初试牛刀 asks for nothing beyond the download.

## The numbers

| Metric | 数学小博士之初试牛刀 | 创视界 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | — |
| Update frequency | Every 13 months | — |
| Size | 14 MB | 8 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 17+ |
| Developer | [习堂 刘](https://appshunter.io/developer/998087258) | [Ultra Pictures Co.,Ltd](https://appshunter.io/developer/1630529386) |

## What reviewers say

### 数学小博士之初试牛刀

[App page](https://appshunter.io/ios/app/id1024285199)

**Features:** macOS Compatibility

**In-app purchases:** none


### 创视界

[App page](https://appshunter.io/ios/app/id1630529384)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 一个月 VIP | $3.99 | per month |
| 三个月 VIP | $6.99 | per 3 months |
| 一年 VIP | $29.99 | per year |


## Frequently asked questions

### Is 数学小博士之初试牛刀 free?

数学小博士之初试牛刀 is free to download, with no in-app purchases.

### Is 创视界 free?

创视界 is free to download, with in-app purchases available.

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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.*