# AIメールくん vs 返信どうする？

The clearest difference is update cadence: AIメールくん at every 9 days against 返信どうする？'s every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. AIメールくん sells 1 in-app purchase, starting at $6.99 per 7 days and 返信どうする？ sells 1 in-app purchase, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

AIメールくん ships an update every 9 days, 返信どうする？ every 3 weeks. The most recent releases landed on September 19, 2026 and August 10, 2026 respectively.

## The numbers

| Metric | AIメールくん | 返信どうする？ |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 3 weeks |
| Monetization | — | Freemium |
| Size | 4 MB | 5 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [AppEngine](https://appshunter.io/developer/1684103190) | [Appricot Co.,Ltd.](https://appshunter.io/developer/1716553156) |

## What reviewers say

### 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 |


### 返信どうする？

[App page](https://appshunter.io/ios/app/ai/id6741709838)

AI-powered tool to generate replies for various messages, from social media to business emails. It automatically detects the context and adjusts the tone, ensuring natural-sounding responses. Also offers proofreading and screenshot text extraction for convenience.

**Highlights:** AI-generated replies, Automatic context detection, Natural text formatting, Draft proofreading, Screenshot text extraction, Reply history and adjustment

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly Plan | $1.99 | per month |


## Frequently asked questions

### Is AIメールくん free?

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

### Is 返信どうする？ free?

返信どうする？ is free to download, with in-app purchases available.

### Do AIメールくん or 返信どうする？ have ads?

Neither AIメールくん nor 返信どうする？ shows ads.

### Which is updated more often, AIメールくん or 返信どうする？?

AIメールくん ships an update every 9 days, and 返信どうする？ every 3 weeks. Most recently, AIメールくん was updated on September 19, 2026 and 返信どうする？ on August 10, 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.*