# Unit Converter Simple vs Colorack

The clearest difference is update cadence: Colorack at every 4 days against Unit Converter Simple's every 10 months. Unit Converter Simple's advantage is iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Unit Converter Simple ships an update every 10 months, Colorack every 4 days. The most recent releases landed on October 24, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Unit Converter Simple | Colorack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/unit-converter-simple/id1531846614/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 10 months | **Every 4 days** |
| Size | 18 MB | 69 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kouji Yamauchi](https://appshunter.io/developer/1519365107) | [KAZUYA SUGAWARA](https://appshunter.io/developer/6789651168) |

## What reviewers say

### Unit Converter Simple

[App page](https://appshunter.io/ios/app/unit-converter-simple/id1531846614)

**Features:** macOS Compatibility

**In-app purchases:** none


### Colorack

[App page](https://appshunter.io/ios/app/colorack/id6789651166)

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

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter Simple free?

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

### Is Colorack free?

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

### Do Unit Converter Simple or Colorack have ads?

Both Unit Converter Simple and Colorack show ads.

### Which is updated more often, Unit Converter Simple or Colorack?

Unit Converter Simple ships an update every 10 months, and Colorack every 4 days. Most recently, Unit Converter Simple was updated on October 24, 2026 and Colorack on October 5, 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.*