# All Unit Conversion vs Converter

The clearest difference is rating: All Unit Conversion at 4.6 against Converter's 3.3. All Unit Conversion also leads on in-app purchases (none vs 1) and update cadence (every 2 months vs every 45 months). Converter's advantage is device support (4 vs 1) and iOS requirement (10.0 vs 16.6). On price, ads and monetization model there is nothing between them.

Both are free to download. Converter sells 1 one-off in-app purchase. All Unit Conversion asks for nothing beyond the download.

All Unit Conversion holds the better App Store score, 4.6 against 3.3. Both are backed by a comparable volume of ratings — 17 and 4 respectively. Written reviews point the same way: 50% of All Unit Conversion's written reviews are positive against 33% of Converter's.

All Unit Conversion ships an update every 2 months, Converter every 45 months. The most recent releases landed on September 13, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | All Unit Conversion | Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (17 ratings)](https://appshunter.io/ios/app/all-unit-conversion/id1418597453/reviews)** | [3.3 (4 ratings)](https://appshunter.io/ios/app/converter-unit-conversion/id1453497685/reviews) |
| Number of ratings | **17** | 4 |
| Positive reviews | **50.0% of reviews** | 33.3% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 45 months |
| Monetization | Free | Free |
| Size | 22 MB | 19 MB |
| Requires iOS | 16.6 | **10.0** |
| Devices | iPhone | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Tiago Do Couto](https://appshunter.io/developer/1291604717) | [Intuz, Inc.](https://appshunter.io/developer/1445627232) |

## 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


### Converter

[App page](https://appshunter.io/ios/app/converter-unit-conversion/id1453497685)

This app offers a comprehensive and customizable unit converter with over 1400 units across 52 categories. It includes a built-in calculator, currency conversion with automatic updates, and specialized converters for clothing and cooking. Designed for ease of use on Apple devices, it supports offline conversions and offers a clean, professional interface.

**Highlights:** Over 1400 units in 52 categories, Integrated custom calculator, Offline unit conversion, Currency conversion with auto-updates, Customizable unit visibility, Widget and Apple Watch support, Conversion history and bookmarking

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade to Pro | $1.99 | one-time |


## Frequently asked questions

### Is All Unit Conversion free?

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

### Is Converter free?

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

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

All Unit Conversion is rated higher. All Unit Conversion averages 4.6 out of 5 from 17 ratings, while Converter averages 3.3 from 4 ratings.

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

Neither All Unit Conversion nor Converter shows ads.

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

All Unit Conversion ships an update every 2 months, and Converter every 45 months. Most recently, All Unit Conversion was updated on September 13, 2026 and Converter on September 21, 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.*