# Unit Converter vs Plain Units

The clearest difference is in-app purchases: Unit Converter at none against Plain Units's 1. Plain Units's advantage is update cadence (every 3 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

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

Unit Converter ships an update every 2 months, Plain Units every 3 weeks. Both last shipped on October 31, 2026.

## The numbers

| Metric | Unit Converter | Plain Units |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Size | 11 MB | 48 MB |
| Requires iOS | 17.6 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MITSUKO MARGOT KUBOTA ONO](https://appshunter.io/developer/1799524637) | [Nicolaus Lawson](https://appshunter.io/developer/1029201825) |

## What reviewers say

### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-us-units/id6760955491)

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

**In-app purchases:** none


### Plain Units

[App page](https://appshunter.io/ios/app/plain-units-unit-converter/id6810955046)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $3.99 | one-time |


## Frequently asked questions

### Is Unit Converter free?

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

### Is Plain Units free?

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

### Do Unit Converter or Plain Units have ads?

Both Unit Converter and Plain Units show ads.

### Which is updated more often, Unit Converter or Plain Units?

Unit Converter ships an update every 2 months, and Plain Units every 3 weeks. Most recently, Unit Converter was updated on October 31, 2026 and Plain Units on October 31, 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.*