# 返信どうする？AI添削・敬語翻訳・言い換えツール vs ReplyAI

The clearest difference is ads: ReplyAI at none against 返信どうする？AI添削・敬語翻訳・言い換えツール's shown. ReplyAI also leads on iOS requirement (15.1 vs 17.0). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. 返信どうする？AI添削・敬語翻訳・言い換えツール sells 1 in-app purchase, starting at $1.99 per month and ReplyAI sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

返信どうする？AI添削・敬語翻訳・言い換えツール ships an update every 4 weeks, ReplyAI fortnightly. The most recent releases landed on November 7, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | 返信どうする？AI添削・敬語翻訳・言い換えツール | ReplyAI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (2 ratings)](https://appshunter.io/ios/app/replyai-find-best-response/id6752980510/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 4 weeks | **Fortnightly** |
| Monetization | Freemium | Freemium |
| Size | 6 MB | 52 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Appricot Co.,Ltd.](https://appshunter.io/developer/1716553156) | [naoki otsu](https://appshunter.io/developer/1082476153) |

## What reviewers say

### 返信どうする？AI添削・敬語翻訳・言い換えツール

[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 |


### ReplyAI

[App page](https://appshunter.io/ios/app/replyai-find-best-response/id6752980510)

This app uses AI to generate intelligent reply suggestions for your messages. You can copy individual sentences or entire replies, manage them in unlimited tabs, and customize themes. It offers robust security features and no login is required.

**Highlights:** AI-generated reply suggestions, Sentence-by-sentence copying, Unlimited reply creation, Unlimited tab management, Dark/light mode support, Biometric authentication, Backup and restore functionality

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $2.99 | per month |


## Frequently asked questions

### Is 返信どうする？AI添削・敬語翻訳・言い換えツール free?

返信どうする？AI添削・敬語翻訳・言い換えツール is free to download, with in-app purchases available.

### Is ReplyAI free?

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

### Do 返信どうする？AI添削・敬語翻訳・言い換えツール or ReplyAI have ads?

返信どうする？AI添削・敬語翻訳・言い換えツール shows ads; ReplyAI does not.

### Which is updated more often, 返信どうする？AI添削・敬語翻訳・言い換えツール or ReplyAI?

返信どうする？AI添削・敬語翻訳・言い換えツール ships an update every 4 weeks, and ReplyAI fortnightly. Most recently, 返信どうする？AI添削・敬語翻訳・言い換えツール was updated on November 7, 2026 and ReplyAI on October 30, 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.*