# All Unit Conversion vs Unit Converter

All Unit Conversion and Unit Converter both sit at 4.6 stars, but that hides the real split: 50% of All Unit Conversion's written reviews are positive against 0% of Unit Converter's. All Unit Conversion also leads on in-app purchases (none vs 1) and ads (none vs shown). Unit Converter's advantage is ratings volume (55 vs 17). On price, rating, update cadence and device support there is nothing between them.

Both are free to download. Unit Converter sells 1 in-app purchase, starting at $2.99 per year. All Unit Conversion asks for nothing beyond the download.

All Unit Conversion holds the better App Store score, 4.6 against 4.4. Both are backed by a comparable volume of ratings — 17 and 55 respectively. Written reviews point the same way: 50% of All Unit Conversion's written reviews are positive against 0% of Unit Converter's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on September 13, 2026 and August 10, 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)** | [4.4 (55 ratings)](https://appshunter.io/ios/app/unit-converter-best-unit-app/id6478766526/reviews) |
| Number of ratings | 17 | **55** |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 22 MB | 34 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Tiago Do Couto](https://appshunter.io/developer/1291604717) | [Usman Perwaiz](https://appshunter.io/developer/1641071451) |

## 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-best-unit-app/id6478766526)

This app offers fast and simple unit conversions across 15 categories, including currency with live updates. Customize your experience with themes, favorite units, and adjustable decimal precision. It's designed for ease of use on iPhone and iPad.

**Highlights:** 15 conversion categories, Live currency updates, Customizable themes, Favorite units section, Adjustable decimal precision, Drag and set unit positions

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Version | $2.99 | per year |


## 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 in-app purchases available.

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

All Unit Conversion is rated higher. All Unit Conversion averages 4.6 out of 5 from 17 ratings, while Unit Converter averages 4.4 from 55 ratings.

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

Unit Converter shows ads; All Unit Conversion does not.

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

All Unit Conversion ships an update every 2 months, and Unit Converter every 2 months. Most recently, All Unit Conversion was updated on September 13, 2026 and Unit Converter on August 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.*