# Converter vs Shift Unit

The clearest difference is review sentiment: Shift Unit at 100% against Converter's 33%. Shift Unit also leads on rating (5.0 vs 3.3) and in-app purchases (none vs 1). Converter's advantage is device support (4 vs 2) and iOS requirement (10.0 vs 16.0). On price, ads and monetization model there is nothing between them.

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

Shift Unit holds the better App Store score, 5.0 against 3.3. That said, the two scores are not equally well evidenced: Shift Unit has 21 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 33% of Converter's written reviews are positive against 100% of Shift Unit's.

Converter ships an update every 45 months, Shift Unit every 2 months. The most recent releases landed on September 21, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | Converter | Shift Unit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (4 ratings)](https://appshunter.io/ios/app/converter-unit-conversion/id1453497685/reviews) | **[5.0 (21 ratings)](https://appshunter.io/ios/app/shift-unit/id1514037983/reviews)** |
| Number of ratings | 4 | **21** |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 45 months | **Every 2 months** |
| Monetization | Free | Free |
| Size | 19 MB | 20 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Intuz, Inc.](https://appshunter.io/developer/1445627232) | [Didier Burton](https://appshunter.io/developer/1514037982) |

## What reviewers say

### 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 |


### Shift Unit

[App page](https://appshunter.io/ios/app/shift-unit/id1514037983)

This utility app offers precise unit and currency conversions with over 1400 units across 34 categories. It supports light/dark modes, home widgets, and an independent Apple Watch app. Features include a custom keypad with calculator mode and educational Wikipedia integration.

**Highlights:** 1400+ conversion units, 34 categories, Light/dark mode support, Home widget, Apple Watch app, Custom keypad with calculator, Wikipedia integration

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

**In-app purchases:** none


## Frequently asked questions

### Is Converter free?

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

### Is Shift Unit free?

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

### Which has better reviews, Converter or Shift Unit?

Shift Unit is rated higher. Converter averages 3.3 out of 5 from 4 ratings, while Shift Unit averages 5.0 from 21 ratings.

### Do Converter or Shift Unit have ads?

Neither Converter nor Shift Unit shows ads.

### Which is updated more often, Converter or Shift Unit?

Converter ships an update every 45 months, and Shift Unit every 2 months. Most recently, Converter was updated on September 21, 2026 and Shift Unit on September 6, 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.*