# Unit Converter vs XS Modifier Coder

The clearest difference is price: Unit Converter at Free against XS Modifier Coder's $0.99. Unit Converter also leads on iOS requirement (17.6 vs 26.5). XS Modifier Coder's advantage is in-app purchases (none vs 1) and update cadence (monthly vs every 3 months). On ads and device support there is nothing between them.

Unit Converter is free to download; XS Modifier Coder costs $0.99 up front. Unit Converter sells 1 one-off in-app purchase. XS Modifier Coder asks for nothing beyond the download.

Unit Converter ships an update every 3 months, XS Modifier Coder monthly. The most recent releases landed on October 25, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Unit Converter | XS Modifier Coder |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.6 (16K ratings)](https://appshunter.io/ios/app/unit-converter-pro-units-app/id1139120257/reviews)** | — |
| Number of ratings | **16K** | — |
| Positive reviews | 33.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 11 MB | 50 MB |
| Requires iOS | **17.6** | 26.5 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tue Nguyen Minh](https://appshunter.io/developer/434811167) | [Joseph Gadzia](https://appshunter.io/developer/6778205857) |

## What reviewers say

### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-pro-units-app/id1139120257)

This app offers a powerful and user-friendly unit converter with 16 categories, including currency, length, and temperature. It allows for custom unit lists and provides live exchange rate updates for 148 currencies. Unlock all features with a one-time in-app purchase.

**Highlights:** 16 conversion categories, Custom unit lists, Live currency exchange rates, 148 world currencies supported, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Features | $2.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Simple design
- 👍 Covers many units
- 👍 User-friendly layout
- 👍 Accurate conversions

**What reviewers complain about**

- 🔒 Limited functionality without paying
- 🔒 Most common units locked behind paywall
- 🐛 Restore purchase not working
- 🐛 Unreliable app support
- 🔒 Conversion categories locked

**Reported bugs**

- Conversion results not always accurate
- App freezes or crashes on some devices
- Purchased features not always accessible

**Requested features**

- Add calculator functionality
- Improve currency conversion
- Provide more unit categories
- Allow creating custom formulas


### XS Modifier Coder

[App page](https://appshunter.io/ios/app/xs-modifier-coder/id6778205735)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter free?

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

### Is XS Modifier Coder free?

XS Modifier Coder costs $0.99, with no in-app purchases.

### Do Unit Converter or XS Modifier Coder have ads?

Neither Unit Converter nor XS Modifier Coder shows ads.

### Which is updated more often, Unit Converter or XS Modifier Coder?

Unit Converter ships an update every 3 months, and XS Modifier Coder monthly. Most recently, Unit Converter was updated on October 25, 2026 and XS Modifier Coder on October 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.*