# 28 vs 敬語ボタン｜AI変換・返信キーボード

The clearest difference is update cadence: 敬語ボタン｜AI変換・返信キーボード at every 3 days against 28's every 6 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

28 ships an update every 6 weeks, 敬語ボタン｜AI変換・返信キーボード every 3 days. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 28 | 敬語ボタン｜AI変換・返信キーボード |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ai/id6777901723/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 days** |
| Monetization | — | Free |
| Size | 314 MB | 229 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [MORI KOSAN CO.,LTD.](https://appshunter.io/developer/1088209108) | [Yihuan Sun](https://appshunter.io/developer/1865050525) |

## What reviewers say

### 28

[App page](https://appshunter.io/ios/app/28-twenty-eight/id1473459624)

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

**In-app purchases:** none


### 敬語ボタン｜AI変換・返信キーボード

[App page](https://appshunter.io/ios/app/ai/id6777901723)

This AI-powered keyboard helps you write Japanese messages with the appropriate tone for any situation. Easily transform your text into polite, professional, or natural-sounding Japanese, and get AI-generated replies without leaving your current app.

**Highlights:** Rewrite Japanese in one tap, AI-generated replies, Complete Japanese keyboard functionality, Multiple text suggestions, Customizable AI buttons, Privacy-focused input processing

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

**In-app purchases:** none


## Frequently asked questions

### Is 28 free?

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

### Is 敬語ボタン｜AI変換・返信キーボード free?

敬語ボタン｜AI変換・返信キーボード is free to download, with no in-app purchases.

### Do 28 or 敬語ボタン｜AI変換・返信キーボード have ads?

Neither 28 nor 敬語ボタン｜AI変換・返信キーボード shows ads.

### Which is updated more often, 28 or 敬語ボタン｜AI変換・返信キーボード?

28 ships an update every 6 weeks, and 敬語ボタン｜AI変換・返信キーボード every 3 days. Most recently, 28 was updated on October 26, 2026 and 敬語ボタン｜AI変換・返信キーボード on October 25, 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.*