# 数学小博士之初试牛刀 vs 非酋鉴定器

The clearest difference is in-app purchases: 数学小博士之初试牛刀 at none against 非酋鉴定器's 8. 非酋鉴定器's advantage is ads (none vs shown) and update cadence (every 10 days vs every 13 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. 非酋鉴定器 sells 8 one-off in-app purchases. 数学小博士之初试牛刀 asks for nothing beyond the download.

数学小博士之初试牛刀 ships an update every 13 months, 非酋鉴定器 every 10 days. The most recent releases landed on September 14, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | 数学小博士之初试牛刀 | 非酋鉴定器 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (28 ratings)](https://appshunter.io/ios/app/id6444915135/reviews)** |
| Number of ratings | — | **28** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 13 months | **Every 10 days** |
| Size | 14 MB | 80 MB |
| Requires iOS | 12.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [习堂 刘](https://appshunter.io/developer/998087258) | [成娥 田](https://appshunter.io/developer/1519673761) |

## 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


### 非酋鉴定器

[App page](https://appshunter.io/ios/app/id6444915135)

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 60钻石 | $0.99 | one-time |
| 300钻石 | $3.99 | one-time |
| 680钻石 | $9.99 | one-time |
| 980钻石 | $14.99 | one-time |
| 1280钻石 | $19.99 | one-time |
| 1980钻石 | $29.99 | one-time |
| 3280钻石 | $49.99 | one-time |
| 6480钻石 | $99.99 | one-time |


## 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 非酋鉴定器 free?

非酋鉴定器 is free to download, with in-app purchases available.

### Do 数学小博士之初试牛刀 or 非酋鉴定器 have ads?

数学小博士之初试牛刀 shows ads; 非酋鉴定器 does not.

### Which is updated more often, 数学小博士之初试牛刀 or 非酋鉴定器?

数学小博士之初试牛刀 ships an update every 13 months, and 非酋鉴定器 every 10 days. Most recently, 数学小博士之初试牛刀 was updated on September 14, 2026 and 非酋鉴定器 on September 27, 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.*