# K vs DuoBoard

The clearest difference is in-app purchases: DuoBoard at none against K's 1. DuoBoard also leads on ads (none vs shown). K's advantage is iOS requirement (15.0 vs 26.4). On price and device support there is nothing between them.

Both are free to download. K sells 1 one-off in-app purchase. DuoBoard asks for nothing beyond the download.

## The numbers

| Metric | K | DuoBoard |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 2 days | — |
| Size | 42 MB | 5 MB |
| Requires iOS | **15.0** | 26.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Jiwon Lee](https://appshunter.io/developer/1829564786) | [Said Lamaarague](https://appshunter.io/developer/1539332700) |

## What reviewers say

### K

[App page](https://appshunter.io/ios/app/k-mahjong/id6761087551)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| K-Mahjong Premium | $19.99 | one-time |


### DuoBoard

[App page](https://appshunter.io/ios/app/duoboard/id6762021908)

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

**In-app purchases:** none


## Frequently asked questions

### Is K free?

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

### Is DuoBoard free?

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

### Do K or DuoBoard have ads?

K shows ads; DuoBoard 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.*