# 错题本 vs 拍照查字数

The clearest difference is iOS requirement: 错题本 at 13.0 against 拍照查字数's 16.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. 错题本 sells 2 in-app purchases, starting at $1.99 per month and 拍照查字数 sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | 错题本 | 拍照查字数 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (5 ratings)](https://appshunter.io/ios/app/id6448860597/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Freemium | — |
| Size | 46 MB | 1 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [深圳市美易网科技有限公司](https://appshunter.io/developer/1647736306) | [Suhang Jiang](https://appshunter.io/developer/1070891050) |

## What reviewers say

### 错题本

[App page](https://appshunter.io/ios/app/id6448860597)

This learning tool helps students and parents efficiently manage incorrect answers from homework and tests. It uses advanced technology to quickly capture, organize, and review mistakes, making studying smarter and more effective.

**Highlights:** Photo capture of incorrect answers, Automatic removal of handwriting, Subject-based categorization, Detailed breakdown of questions and solutions, Custom practice test generation, Daily review for targeted learning

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 连续包月 | $1.99 | per month |
| 连续包年 | $9.99 | per year |


### 拍照查字数

[App page](https://appshunter.io/ios/app/id6786127510)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 体验包10页 | $0.99 | one-time |
| 常用包50页 | $1.99 | one-time |
| 进阶包200页 | $3.99 | one-time |


## Frequently asked questions

### Is 错题本 free?

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

### Is 拍照查字数 free?

拍照查字数 is free to download, with in-app purchases available.

### Do 错题本 or 拍照查字数 have ads?

Neither 错题本 nor 拍照查字数 shows ads.

### Which is updated more often, 错题本 or 拍照查字数?

错题本 ships an update every 2 months, and 拍照查字数 every 2 months. Most recently, 错题本 was updated on November 3, 2026 and 拍照查字数 on November 5, 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.*