# Unit Converter Lite vs Smart Unit Conversion

The clearest difference is in-app purchases: Unit Converter Lite at none against Smart Unit Conversion's 1. Unit Converter Lite also leads on ads (none vs shown) and update cadence (every 5 months vs every 15 months). On price, device support and iOS requirement 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 Lite asks for nothing beyond the download.

Unit Converter Lite ships an update every 5 months, Smart Unit Conversion every 15 months. The most recent releases landed on September 30, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Unit Converter Lite | Smart Unit Conversion |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 months** | Every 15 months |
| Size | 2 MB | 41 MB |
| Requires iOS | **13.0** | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Tomasz Parys](https://appshunter.io/developer/1531760462) | [Yui Lau](https://appshunter.io/developer/1791465155) |

## What reviewers say

### Unit Converter Lite

[App page](https://appshunter.io/ios/app/unit-converter-lite/id1532243563)

**Features:** macOS Compatibility

**In-app purchases:** none


### Smart Unit Conversion

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

**Features:** macOS Compatibility

**In-app purchases (1)**

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


## Frequently asked questions

### Is Unit Converter Lite free?

Unit Converter Lite 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 Lite or Smart Unit Conversion have ads?

Smart Unit Conversion shows ads; Unit Converter Lite does not.

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

Unit Converter Lite ships an update every 5 months, and Smart Unit Conversion every 15 months. Most recently, Unit Converter Lite was updated on September 30, 2026 and Smart Unit Conversion on October 8, 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.*