# AI Essay Optimization vs ZetReader

The clearest difference is in-app purchases: ZetReader at none against AI Essay Optimization's 3. AI Essay Optimization's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. AI Essay Optimization sells 3 in-app purchases, starting at $0.99 per 7 days. ZetReader asks for nothing beyond the download.

## The numbers

| Metric | AI Essay Optimization | ZetReader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | — |
| Update frequency | Every 6 days | — |
| Size | 34 MB | 38 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [立元 赵](https://appshunter.io/developer/1286588316) | [Whanyun Choi](https://appshunter.io/developer/1270165622) |

## What reviewers say

### AI Essay Optimization

[App page](https://appshunter.io/ios/app/ai-essay-optimization-revision/id6447417135)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One week | $0.99 | per 7 days |
| one month | $2.99 | per month |
| One year | $12.99 | per year |


### ZetReader

[App page](https://appshunter.io/ios/app/zetreader-barcode-qrcode/id6748434495)

**In-app purchases:** none


## Frequently asked questions

### Is AI Essay Optimization free?

AI Essay Optimization is free to download, with in-app purchases available.

### Is ZetReader free?

ZetReader is free to download, with no in-app purchases.

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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.*