# 口算批改 vs 作业快对

The clearest difference is in-app purchases: 作业快对 at none against 口算批改's 3. 口算批改's advantage is update cadence (every 4 months vs every 17 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 口算批改 sells 3 in-app purchases, starting at $2.99 per 7 days. 作业快对 asks for nothing beyond the download.

口算批改 ships an update every 4 months, 作业快对 every 17 months. The most recent releases landed on November 3, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 口算批改 | 作业快对 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (21 ratings)](https://appshunter.io/ios/app/id1574452927/reviews)** | — |
| Number of ratings | **21** | — |
| Positive reviews | 20.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 17 months |
| Monetization | Freemium | — |
| Size | 77 MB | 54 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Hangzhou Jiadi Bozhong](https://appshunter.io/developer/1506720843) | [佐北 宁](https://appshunter.io/developer/1556784907) |

## What reviewers say

### 口算批改

[App page](https://appshunter.io/ios/app/id1574452927)

Instantly grade math and English assignments with a photo. This tool helps parents and teachers quickly identify errors, provides correct answers, and offers practice exercises. It also supports batch printing and PDF export for convenient study materials.

**Highlights:** Photo-based math homework grading, Error highlighting with correct answers, English essay grammar correction, Extensive subject test papers, Customizable oral calculation practice, Batch printing and PDF export

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 口算批改周会员VIP | $2.99 | per 7 days |
| 拍照搜题月会员 | $8.99 | per month |
| 作业批改年会员 | $24.49 | per year |


### 作业快对

[App page](https://appshunter.io/ios/app/ai/id6475805372)

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

**In-app purchases:** none


## Frequently asked questions

### Is 口算批改 free?

口算批改 is free to download, with in-app purchases available.

### Is 作业快对 free?

作业快对 is free to download, with no in-app purchases.

### Do 口算批改 or 作业快对 have ads?

Neither 口算批改 nor 作业快对 shows ads.

### Which is updated more often, 口算批改 or 作业快对?

口算批改 ships an update every 4 months, and 作业快对 every 17 months. Most recently, 口算批改 was updated on November 3, 2026 and 作业快对 on October 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.*