# Unit Converter Simple vs HK Service

The clearest difference is ads: HK Service at none against Unit Converter Simple's shown. HK Service also leads on update cadence (every 3 days vs every 10 months). Unit Converter Simple's advantage is iOS requirement (13.0 vs 15.0). On price, 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, HK Service every 3 days. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Unit Converter Simple | HK Service |
| --- | --- | --- |
| 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 | **No** |
| Update frequency | Every 10 months | **Every 3 days** |
| Size | 18 MB | 3 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kouji Yamauchi](https://appshunter.io/developer/1519365107) | [HK Global](https://appshunter.io/developer/1746674367) |

## What reviewers say

### Unit Converter Simple

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

**Features:** macOS Compatibility

**In-app purchases:** none


### HK Service

[App page](https://appshunter.io/ios/app/hk-service/id6503035863)

**Features:** macOS Compatibility

**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 HK Service free?

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

### Do Unit Converter Simple or HK Service have ads?

Unit Converter Simple shows ads; HK Service does not.

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

Unit Converter Simple ships an update every 10 months, and HK Service every 3 days. Most recently, Unit Converter Simple was updated on October 24, 2026 and HK Service on October 19, 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.*