# OK Grammar vs AI作文批改

The clearest difference is ads: OK Grammar at none against AI作文批改's shown. On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. OK Grammar sells 4 in-app purchases, starting at $3.99 per month and AI作文批改 sells 3 in-app purchases, starting at $5.49 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | OK Grammar | AI作文批改 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/ai/id6443743872/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | — |
| Monetization | — | Free with in-app purchases |
| Size | 53 MB | 40 MB |
| Requires iOS | **12.0** | 12.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [广素 陈](https://appshunter.io/developer/1512523453) | [Hangzhou QingYu Technology Co.,Ltd.](https://appshunter.io/developer/1453279215) |

## What reviewers say

### OK Grammar

[App page](https://appshunter.io/ios/app/ok-grammar/id1536323300)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 mo. Premium | $3.99 | per month |
| 3 mos. Premium | $7.99 | per 3 months |
| 1 year Premium | $12.99 | per year |
| Grammar Checking | $0.99 | one-time |


### AI作文批改

[App page](https://appshunter.io/ios/app/ai/id6443743872)

This app analyzes and corrects grammar and structural errors in Chinese and English essays. It offers detailed feedback, identifies the root cause of mistakes, and can even recognize text from images. Ideal for students, professionals, and educators seeking to improve writing skills.

**Highlights:** Intelligent essay error correction, Grammar and structure analysis, OCR image text recognition, Root cause analysis of mistakes, Multi-dimensional scoring and suggestions, Supports Chinese and English essays

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 作文批改月会员 | $5.49 | per month |
| 作文批改年费会员 | $19.99 | one-time |
| 作文批改终身会员 | $41.99 | one-time |


## Frequently asked questions

### Is OK Grammar free?

OK Grammar is free to download, with in-app purchases available.

### Is AI作文批改 free?

AI作文批改 is free to download, with in-app purchases available.

### Do OK Grammar or AI作文批改 have ads?

AI作文批改 shows ads; OK Grammar does not.

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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.*