# 证件照 vs 作业改改

The clearest difference is device support: 证件照 at 3 against 作业改改's —. 作业改改's advantage is iOS requirement (9.0 vs 12.0). On price and in-app purchases there is nothing between them.

Both are free to download. 证件照 sells 2 in-app purchases, starting at $6.99 per 3 months and 作业改改 sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | 证件照 | 作业改改 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id6459903159/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | — |
| Update frequency | Weekly | — |
| Monetization | — | Freemium |
| Size | 28 MB | 30 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [Parkson Limited](https://appshunter.io/developer/1640212841) | [明笑 常](https://appshunter.io/developer/1683247572) |

## What reviewers say

### 证件照

[App page](https://appshunter.io/ios/app/and/id1640212839)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 证件照会员季度购买 | $6.99 | per 3 months |
| 证件照连续包年高级会员购买 | $25.49 | per year |


### 作业改改

[App page](https://appshunter.io/ios/app/id6459903159)

This app quickly checks math calculations and grades English essays via photo or text input. It also scans documents into PDFs for easy sharing across devices, streamlining the grading and administrative process.

**Highlights:** Photo check for math calculations, AI grading for English essays, Document scanning to PDF, Cross-device sharing, Time-saving efficiency

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $3.99 | per 7 days |
| 月会员 | $6.99 | per month |
| 年会员 | $14.99 | per year |


## Frequently asked questions

### Is 证件照 free?

证件照 is free to download, with in-app purchases available.

### Is 作业改改 free?

作业改改 is free to download, with in-app purchases available.

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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.*