# Kohoku Rules vs Grooz Keyboard

The clearest difference is in-app purchases: Kohoku Rules at none against Grooz Keyboard's 2. Grooz Keyboard's advantage is update cadence (monthly vs every 23 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Grooz Keyboard sells 2 in-app purchases, starting at $4.99 per 7 days. Kohoku Rules asks for nothing beyond the download.

Kohoku Rules ships an update every 23 months, Grooz Keyboard monthly. The most recent releases landed on November 3, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Kohoku Rules | Grooz Keyboard |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 23 months | **Monthly** |
| Size | 2 MB | 271 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [G-Place Corporation](https://appshunter.io/developer/778569521) | [EYWIN BILGI TEKNOLOJILERI ANONIM SIRKETI](https://appshunter.io/developer/1492105189) |

## What reviewers say

### Kohoku Rules

[App page](https://appshunter.io/ios/app/kohoku-rules/id1473916351)

**In-app purchases:** none


### Grooz Keyboard

[App page](https://appshunter.io/ios/app/grooz-keyboard/id6451364300)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Keyboard Weekly Premium | $4.99 | per 7 days |
| Grooz Keyboard Annual | $29.99 | per year |


## Frequently asked questions

### Is Kohoku Rules free?

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

### Is Grooz Keyboard free?

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

### Do Kohoku Rules or Grooz Keyboard have ads?

Neither Kohoku Rules nor Grooz Keyboard shows ads.

### Which is updated more often, Kohoku Rules or Grooz Keyboard?

Kohoku Rules ships an update every 23 months, and Grooz Keyboard monthly. Most recently, Kohoku Rules was updated on November 3, 2026 and Grooz Keyboard on November 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*