# All Unit Conversion vs The Conversion App

The clearest difference is rating: All Unit Conversion at 4.6 against The Conversion App's 4.1. The Conversion App's advantage is device support (3 vs 1) and ratings volume (60 vs 17). On price, review sentiment, update cadence and ads there is nothing between them.

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

All Unit Conversion holds the better App Store score, 4.6 against 4.1. Both are backed by a comparable volume of ratings — 17 and 60 respectively. Written reviews point the same way: 50% of All Unit Conversion's written reviews are positive against 45% of The Conversion App's.

All Unit Conversion ships an update every 2 months, The Conversion App every 5 weeks. The most recent releases landed on September 13, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | All Unit Conversion | The Conversion App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (17 ratings)](https://appshunter.io/ios/app/all-unit-conversion/id1418597453/reviews)** | [4.1 (60 ratings)](https://appshunter.io/ios/app/the-conversion-app/id1507894827/reviews) |
| Number of ratings | 17 | **60** |
| Positive reviews | **50.0% of reviews** | 45.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 22 MB | 17 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tiago Do Couto](https://appshunter.io/developer/1291604717) | [Sparrow Development LLC](https://appshunter.io/developer/1291798088) |

## 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


### The Conversion App

[App page](https://appshunter.io/ios/app/the-conversion-app/id1507894827)

This utility app offers a simple and powerful way to perform various unit conversions. It supports a wide range of categories and allows users to request new conversions to be added. Available on iPhone and iPad, it's designed for ease of use.

**Highlights:** Area conversion, Data conversion, Length conversion, Speed conversion, Time conversion, Volume conversion, Weight conversion

**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 The Conversion App free?

The Conversion App is free to download, with no in-app purchases.

### Which has better reviews, All Unit Conversion or The Conversion App?

All Unit Conversion is rated higher. All Unit Conversion averages 4.6 out of 5 from 17 ratings, while The Conversion App averages 4.1 from 60 ratings.

### Do All Unit Conversion or The Conversion App have ads?

Neither All Unit Conversion nor The Conversion App shows ads.

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

All Unit Conversion ships an update every 2 months, and The Conversion App every 5 weeks. Most recently, All Unit Conversion was updated on September 13, 2026 and The Conversion App on September 18, 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.*