# 뤼튼 vs 코하

The clearest difference is in-app purchases: 코하 at none against 뤼튼's 11. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 뤼튼 sells 11 one-off in-app purchases. 코하 asks for nothing beyond the download.

뤼튼 ships an update every 2 weeks, 코하 fortnightly. The most recent releases landed on October 25, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | 뤼튼 | 코하 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (48 ratings)](https://appshunter.io/ios/app/ai/id6448556170/reviews)** | — |
| Number of ratings | **48** | — |
| Positive reviews | 43.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 201 MB | 35 MB |
| Requires iOS | **15.5** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [wrtn technologies Inc.](https://appshunter.io/developer/1684966734) | [iFamilySC Co., Ltd.](https://appshunter.io/developer/1142144155) |

## What reviewers say

### 뤼튼

[App page](https://appshunter.io/ios/app/ai/id6448556170)

This AI-powered assistant offers a suite of tools for writing, image generation, and English conversation practice. It learns your preferences for personalized support and provides a secure, encrypted chat experience. Earn rewards by using the app and completing simple missions.

**Highlights:** AI writing and editing tools, AI image generation, AI English conversation partner, Personalized AI support, App-based rewards system, Analysis of documents and images

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

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 열쇠 9개 | $0.99 | one-time |
| 4,400 크레딧 | $3.99 | one-time |
| 열쇠 45개 | $4.99 | one-time |
| 10000 크레딧 | $9.99 | one-time |
| 열쇠 99개 | $9.99 | one-time |
| 20000 크레딧 | $17.99 | one-time |
| 열쇠 290개 | $19.99 | one-time |
| 열쇠 450개 | $34.99 | one-time |
| 50000 크레딧 | $39.99 | one-time |
| 100000 크레딧 | $99.99 | one-time |
| 200000 크레딧 | $199.99 | one-time |


### 코하

[App page](https://appshunter.io/ios/app/id6503284909)

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

**In-app purchases:** none


## Frequently asked questions

### Is 뤼튼 free?

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

### Is 코하 free?

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

### Do 뤼튼 or 코하 have ads?

Neither 뤼튼 nor 코하 shows ads.

### Which is updated more often, 뤼튼 or 코하?

뤼튼 ships an update every 2 weeks, and 코하 fortnightly. Most recently, 뤼튼 was updated on October 25, 2026 and 코하 on October 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.*