# Unit Converter ( Calculator ) vs 뤼튼

The clearest difference is rating: Unit Converter ( Calculator ) at 4.8 against 뤼튼's 3.8. Unit Converter ( Calculator ) also leads on in-app purchases (none vs 11) and iOS requirement (13.0 vs 15.5). 뤼튼's advantage is ads (none vs shown) and update cadence (every 2 weeks vs monthly). On price, ratings volume and device support there is nothing between them.

Both are free to download. 뤼튼 sells 11 one-off in-app purchases. Unit Converter ( Calculator ) asks for nothing beyond the download.

Unit Converter ( Calculator ) holds the better App Store score, 4.8 against 3.8. Both are backed by a comparable volume of ratings — 129 and 48 respectively. Written reviews complicate that: 35% of Unit Converter ( Calculator )'s written reviews are positive against 44% of 뤼튼's, so the app with the better star average is not the one people write more warmly about.

Unit Converter ( Calculator ) ships an update monthly, 뤼튼 every 2 weeks. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Unit Converter ( Calculator ) | 뤼튼 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (129 ratings)](https://appshunter.io/ios/app/unit-converter-calculator/id904830056/reviews)** | [3.8 (48 ratings)](https://appshunter.io/ios/app/ai/id6448556170/reviews) |
| Number of ratings | **129** | 48 |
| Positive reviews | 34.6% of reviews | **43.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 6 MB | 201 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [EONSOFT](https://appshunter.io/developer/899851112) | [wrtn technologies Inc.](https://appshunter.io/developer/1684966734) |

## What reviewers say

### Unit Converter ( Calculator )

[App page](https://appshunter.io/ios/app/unit-converter-calculator/id904830056)

Easily convert between various units of measurement for length, weight, volume, temperature, and more. This tool simplifies calculations for everyday needs and specific applications.

**Highlights:** Length conversion, Weight conversion, Volume conversion, Temperature conversion, Pressure conversion, Velocity conversion

**Features:** Vision Pro support

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Unit Converter ( Calculator ) free?

Unit Converter ( Calculator ) is free to download, with no in-app purchases.

### Is 뤼튼 free?

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

### Which has better reviews, Unit Converter ( Calculator ) or 뤼튼?

Unit Converter ( Calculator ) is rated higher. Unit Converter ( Calculator ) averages 4.8 out of 5 from 129 ratings, while 뤼튼 averages 3.8 from 48 ratings.

### Do Unit Converter ( Calculator ) or 뤼튼 have ads?

Unit Converter ( Calculator ) shows ads; 뤼튼 does not.

### Which is updated more often, Unit Converter ( Calculator ) or 뤼튼?

Unit Converter ( Calculator ) ships an update monthly, and 뤼튼 every 2 weeks. Most recently, Unit Converter ( Calculator ) was updated on October 29, 2026 and 뤼튼 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.*