# Bubble Grammar vs Kees

The clearest difference is ads: Bubble Grammar at none against Kees's shown. Bubble Grammar also leads on update cadence (every 4 days vs every 2 weeks) and iOS requirement (13.0 vs 15.5). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Bubble Grammar sells 1 in-app purchase, starting at $29.99 per 6 months and Kees sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Bubble Grammar ships an update every 4 days, Kees every 2 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | Bubble Grammar | Kees |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Size | 37 MB | 156 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Raushan Nimatov](https://appshunter.io/developer/1888973196) | [Yigit Yildirim](https://appshunter.io/developer/6792115913) |

## What reviewers say

### Bubble Grammar

[App page](https://appshunter.io/ios/app/bubble-grammar-learn-dutch/id6784233278)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bubble Grammar Pro | $29.99 | per 6 months |


### Kees

[App page](https://appshunter.io/ios/app/kees-learn-dutch/id6792115911)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kees Pro Monthly | $3.99 | per month |
| Kees Pro Six Months | $14.99 | per 6 months |
| Kees Pro Yearly | $24.99 | per year |


## Frequently asked questions

### Is Bubble Grammar free?

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

### Is Kees free?

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

### Do Bubble Grammar or Kees have ads?

Kees shows ads; Bubble Grammar does not.

### Which is updated more often, Bubble Grammar or Kees?

Bubble Grammar ships an update every 4 days, and Kees every 2 weeks. Most recently, Bubble Grammar was updated on October 24, 2026 and Kees on October 24, 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.*