# HK MarkSix Guide vs Instant Unit Calc

The clearest difference is ads: HK MarkSix Guide at none against Instant Unit Calc's shown. On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

## The numbers

| Metric | HK MarkSix Guide | Instant Unit Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | — |
| Size | 33 MB | 34 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [YIU WING NG](https://appshunter.io/developer/1454513690) | [Keisuke Yamakawa](https://appshunter.io/developer/1281004284) |

## What reviewers say

### HK MarkSix Guide

[App page](https://appshunter.io/ios/app/hk-marksix-guide/id6746738751)

**Features:** macOS Compatibility

**In-app purchases:** none


### Instant Unit Calc

[App page](https://appshunter.io/ios/app/instant-unit-calc/id6795980524)

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

**In-app purchases:** none


## Frequently asked questions

### Is HK MarkSix Guide free?

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

### Is Instant Unit Calc free?

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

### Do HK MarkSix Guide or Instant Unit Calc have ads?

Instant Unit Calc shows ads; HK MarkSix Guide does not.

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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.*