# Unit Converter vs Smart Unit Conversion

The clearest difference is in-app purchases: Unit Converter at none against Smart Unit Conversion's 1. Unit Converter also leads on update cadence (every 5 weeks vs every 15 months). Smart Unit Conversion's advantage is iOS requirement (13.4 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Smart Unit Conversion sells 1 in-app purchase, starting at $1.99 per year. Unit Converter asks for nothing beyond the download.

Unit Converter ships an update every 5 weeks, Smart Unit Conversion every 15 months. The most recent releases landed on October 30, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Unit Converter | Smart Unit Conversion |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/unit-converter-14-in-1/id1587655048/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 5 weeks** | Every 15 months |
| Monetization | Ad-supported | — |
| Size | 10 MB | 41 MB |
| Requires iOS | 17.0 | **13.4** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Noadit, Inc.](https://appshunter.io/developer/1516754355) | [Yui Lau](https://appshunter.io/developer/1791465155) |

## What reviewers say

### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-14-in-1/id1587655048)

This tool provides fast and accurate conversions across 14 common physical unit categories. It supports metric, imperial, and traditional Chinese units, with customizable display styles for personalized use. Ideal for everyday and professional conversion needs.

**Highlights:** 14 unit categories, Metric, imperial, and Chinese units, Customizable display styles, Accurate conversions, Supports length, area, volume, mass, temperature, and more

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

**In-app purchases:** none


### Smart Unit Conversion

[App page](https://appshunter.io/ios/app/smart-unit-conversion/id1643381985)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Year | $1.99 | per year |


## Frequently asked questions

### Is Unit Converter free?

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

### Is Smart Unit Conversion free?

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

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

Both Unit Converter and Smart Unit Conversion show ads.

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

Unit Converter ships an update every 5 weeks, and Smart Unit Conversion every 15 months. Most recently, Unit Converter was updated on October 30, 2026 and Smart Unit Conversion on October 27, 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.*