# AI文書スタイル変換 vs AIメールくん

The clearest difference is ads: AIメールくん at none against AI文書スタイル変換's shown. AIメールくん also leads on update cadence (every 9 days vs every 4 months) and iOS requirement (16.0 vs 18). On price, in-app purchases and device support there is nothing between them.

Both are free to download. AI文書スタイル変換 sells 2 one-off in-app purchases and AIメールくん sells 1 in-app purchase, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

AI文書スタイル変換 ships an update every 4 months, AIメールくん every 9 days. The most recent releases landed on September 17, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | AI文書スタイル変換 | AIメールくん |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 9 days** |
| Size | 10 MB | 4 MB |
| Requires iOS | 18 | **16.0** |
| Devices | iPhone | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [Osawa Shunsuke](https://appshunter.io/developer/477431394) | [AppEngine](https://appshunter.io/developer/1684103190) |

## What reviewers say

### AI文書スタイル変換

[App page](https://appshunter.io/ios/app/ai/id6446862035)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 開発を支援する | $1.99 | one-time |
| Pro版 | $4.99 | one-time |


### AIメールくん

[App page](https://appshunter.io/ios/app/ai/id6470747443)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $6.99 | per 7 days |


## Frequently asked questions

### Is AI文書スタイル変換 free?

AI文書スタイル変換 is free to download, with in-app purchases available.

### Is AIメールくん free?

AIメールくん is free to download, with in-app purchases available.

### Do AI文書スタイル変換 or AIメールくん have ads?

AI文書スタイル変換 shows ads; AIメールくん does not.

### Which is updated more often, AI文書スタイル変換 or AIメールくん?

AI文書スタイル変換 ships an update every 4 months, and AIメールくん every 9 days. Most recently, AI文書スタイル変換 was updated on September 17, 2026 and AIメールくん on September 19, 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.*