# Converter X vs Shift Unit

The clearest difference is in-app purchases: Shift Unit at none against Converter X's 3. Shift Unit also leads on ads (none vs shown) and rating (5.0 vs 4.7). Converter X's advantage is iOS requirement (17.0 vs 26.0). On price, ratings volume, update cadence and device support there is nothing between them.

Both are free to download. Converter X sells 3 in-app purchases, starting at $1.99 per month. Shift Unit asks for nothing beyond the download.

Shift Unit holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 30 and 21 respectively. Written reviews point the same way: 82% of Converter X's written reviews are positive against 100% of Shift Unit's.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Converter X | Shift Unit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (30 ratings)](https://appshunter.io/ios/app/converter-x-unit-and-currency/id1072532549/reviews) | **[5.0 (21 ratings)](https://appshunter.io/ios/app/shift-unit/id1514037983/reviews)** |
| Number of ratings | **30** | 21 |
| Positive reviews | 81.8% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 61 MB | 18 MB |
| Requires iOS | **17.0** | 26.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, Apple Watch |
| Age rating | +4 | 4+ |
| Developer | [Leonardo Bilia](https://appshunter.io/developer/1063170763) | [Didier Burton](https://appshunter.io/developer/1514037982) |

## What reviewers say

### Converter X

[App page](https://appshunter.io/ios/app/converter-x-unit-and-currency/id1072532549)

This app provides real-time currency and unit conversions, along with international clothing size comparisons. It features a smart input system that understands natural language and offers AI explanations for conversions, enhancing daily productivity and travel planning.

**Highlights:** Real-time currency conversion (167 currencies), Comprehensive unit conversion (201 units), International clothing size conversion, 14 built-in utility tools, Smart input with natural language parsing, AI assistance for conversion explanations

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $1.99 | per month |
| Annual Premium | $16.99 | per year |
| Lifetime Premium | $40.99 | 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 X free?

Converter X 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 X or Shift Unit?

Shift Unit is rated higher. Converter X averages 4.7 out of 5 from 30 ratings, while Shift Unit averages 5.0 from 21 ratings.

### Do Converter X or Shift Unit have ads?

Converter X shows ads; Shift Unit does not.

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

Converter X ships an update every 2 months, and Shift Unit every 2 months. Most recently, Converter X was updated on November 2, 2026 and Shift Unit on November 3, 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.*