# 错题机H2 vs 小牛错题本

The clearest difference is in-app purchases: 错题机H2 at none against 小牛错题本's 4. 错题机H2 also leads on iOS requirement (9.0 vs 12.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 小牛错题本 sells 4 in-app purchases, starting at $2.99 per month. 错题机H2 asks for nothing beyond the download.

错题机H2 ships an update every 5 weeks, 小牛错题本 monthly. The most recent releases landed on June 3, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | 错题机H2 | 小牛错题本 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.5 (2 ratings)](https://appshunter.io/ios/app/h2/id1585629795/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Monthly** |
| Monetization | Free | — |
| Size | 264 MB | 105 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [xiamen ileadtek Co.,Ltd](https://appshunter.io/developer/1354877112) | [深圳市云领天下科技有限公司](https://appshunter.io/developer/725440563) |

## What reviewers say

### 错题机H2

[App page](https://appshunter.io/ios/app/h2/id1585629795)

This app combines learning, office productivity, and daily life tools. It pairs with a mini printer for inkless printing of notes, labels, and photos. Features include error correction, document editing, and text recognition.

**Highlights:** Error correction printing, Cloud-based error notebook, Chinese traditional culture learning, Foreign language learning with pronunciation, Document editing and printing, Text recognition from images, Label and photo printing, Daily planner and to-do lists

**Features:** macOS Compatibility

**In-app purchases:** none


### 小牛错题本

[App page](https://appshunter.io/ios/app/id6474232623)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 小牛错题本连续包月（1个月） | $2.99 | per month |
| 小牛错题本连续包季（3个月） | $5.99 | per 3 months |
| 小牛错题本会员1个月 | $3.99 | one-time |
| 小牛错题本会员6个月 | $14.99 | one-time |


## Frequently asked questions

### Is 错题机H2 free?

错题机H2 is free to download, with no in-app purchases.

### Is 小牛错题本 free?

小牛错题本 is free to download, with in-app purchases available.

### Do 错题机H2 or 小牛错题本 have ads?

Neither 错题机H2 nor 小牛错题本 shows ads.

### Which is updated more often, 错题机H2 or 小牛错题本?

错题机H2 ships an update every 5 weeks, and 小牛错题本 monthly. Most recently, 错题机H2 was updated on June 3, 2026 and 小牛错题本 on September 9, 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.*