# The Best Unit Converter vs Simple Unit Convert Pro

The clearest difference is rating: Simple Unit Convert Pro at 5.0 against The Best Unit Converter's 4.2. Simple Unit Convert Pro also leads on in-app purchases (none vs 3). The Best Unit Converter's advantage is update cadence (weekly vs every 2 months) and iOS requirement (13.0 vs 15.1). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. The Best Unit Converter sells 3 one-off in-app purchases. Simple Unit Convert Pro asks for nothing beyond the download.

Simple Unit Convert Pro holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 5 and 5 respectively.

The Best Unit Converter ships an update weekly, Simple Unit Convert Pro every 2 months. The most recent releases landed on November 2, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | The Best Unit Converter | Simple Unit Convert Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/the-best-unit-converter/id1360876047/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/simple-unit-convert-pro/id6477877519/reviews)** |
| Number of ratings | 5 | 5 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 8 MB | 27 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Michael Baron](https://appshunter.io/developer/1468892980) | [Annika Gadman](https://appshunter.io/developer/1728509902) |

## What reviewers say

### The Best Unit Converter

[App page](https://appshunter.io/ios/app/the-best-unit-converter/id1360876047)

Easily convert between various units with a simple interface. This application supports numerous conversions, allowing you to switch between different units and back again with just a few taps.

**Highlights:** Multiple unit conversions, Simple and clean design, Easy to use interface, Converts units and back again, Supports various measurement types

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| More Units | $0.99 | one-time |
| Intrasystem Conversions | $1.99 | one-time |


### Simple Unit Convert Pro

[App page](https://appshunter.io/ios/app/simple-unit-convert-pro/id6477877519)

This utility app offers a comprehensive solution for converting various units of measurement. It simplifies daily tasks by providing precise conversions for temperature, speed, distance, weight, volume, and area. Streamline your needs with this user-friendly converter.

**Highlights:** Temperature conversion (Fahrenheit/Celsius), Speed conversion (mph/kph), Distance conversion (miles/kilometers), Weight conversion (lbs/oz/kg), Volume conversion (cups/ml/gallons), Area conversion (sq ft/sq m)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is The Best Unit Converter free?

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

### Is Simple Unit Convert Pro free?

Simple Unit Convert Pro is free to download, with no in-app purchases.

### Which has better reviews, The Best Unit Converter or Simple Unit Convert Pro?

Simple Unit Convert Pro is rated higher. The Best Unit Converter averages 4.2 out of 5 from 5 ratings, while Simple Unit Convert Pro averages 5.0 from 5 ratings.

### Do The Best Unit Converter or Simple Unit Convert Pro have ads?

Neither The Best Unit Converter nor Simple Unit Convert Pro shows ads.

### Which is updated more often, The Best Unit Converter or Simple Unit Convert Pro?

The Best Unit Converter ships an update weekly, and Simple Unit Convert Pro every 2 months. Most recently, The Best Unit Converter was updated on November 2, 2026 and Simple Unit Convert Pro on November 4, 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.*