# All Unit Conversion vs Unit Converter

The clearest difference is review sentiment: Unit Converter at 90% against All Unit Conversion's 50%. Unit Converter also leads on update cadence (weekly vs every 2 months) and rating (4.9 vs 4.6). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

Unit Converter holds the better App Store score, 4.9 against 4.6. Both are backed by a comparable volume of ratings — 17 and 18 respectively. Written reviews point the same way: 50% of All Unit Conversion's written reviews are positive against 90% of Unit Converter's.

All Unit Conversion ships an update every 2 months, Unit Converter weekly. The most recent releases landed on October 17, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | All Unit Conversion | Unit Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (17 ratings)](https://appshunter.io/ios/app/all-unit-conversion/id1418597453/reviews) | **[4.9 (18 ratings)](https://appshunter.io/ios/app/unit-converter-scientific/id6692634387/reviews)** |
| Number of ratings | 17 | **18** |
| Positive reviews | 50.0% of reviews | **90.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free | Free |
| Size | 22 MB | 4 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Tiago Do Couto](https://appshunter.io/developer/1291604717) | [Ahmet Burak Albayrak](https://appshunter.io/developer/1769045837) |

## What reviewers say

### All Unit Conversion

[App page](https://appshunter.io/ios/app/all-unit-conversion/id1418597453)

Easily convert between various units of measurement with this free utility app. It supports conversions for length, area, volume, mass, time, digital storage, energy, and currency.

**Highlights:** Length conversion, Area conversion, Volume conversion, Mass conversion, Time conversion, Currency conversion

**Features:** macOS Compatibility

**In-app purchases:** none


### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-scientific/id6692634387)

Easily perform instant unit conversions across a vast array of categories, from engineering to everyday life. Features include dark mode, favorites, and dual language support for enhanced usability. Ideal for scientists, engineers, students, and anyone needing quick, accurate conversions.

**Highlights:** Extensive conversion categories, Dark mode for night use, Favorite frequently used conversions, Dual language support, Offline functionality, User feedback option

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

**In-app purchases:** none


## Frequently asked questions

### Is All Unit Conversion free?

All Unit Conversion is free to download, with no in-app purchases.

### Is Unit Converter free?

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

### Which has better reviews, All Unit Conversion or Unit Converter?

Unit Converter is rated higher. All Unit Conversion averages 4.6 out of 5 from 17 ratings, while Unit Converter averages 4.9 from 18 ratings.

### Do All Unit Conversion or Unit Converter have ads?

Neither All Unit Conversion nor Unit Converter shows ads.

### Which is updated more often, All Unit Conversion or Unit Converter?

All Unit Conversion ships an update every 2 months, and Unit Converter weekly. Most recently, All Unit Conversion was updated on October 17, 2026 and Unit Converter on September 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.*