# Kokka Number Study vs Skylang

The clearest difference is in-app purchases: Kokka Number Study at none against Skylang's 2. Kokka Number Study also leads on update cadence (every 2 days vs every 5 days) and iOS requirement (15.1 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Skylang sells 2 in-app purchases, starting at $19.99 per month. Kokka Number Study asks for nothing beyond the download.

Kokka Number Study ships an update every 2 days, Skylang every 5 days. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Kokka Number Study | Skylang |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (8 ratings)](https://appshunter.io/ios/app/skylang-learn-korean/id6759622643/reviews)** |
| Number of ratings | — | **8** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 5 days |
| Monetization | — | Free with in-app purchases |
| Size | 34 MB | 63 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [jaewook shin](https://appshunter.io/developer/1866841028) | [Skylang, Inc](https://appshunter.io/developer/1879849563) |

## What reviewers say

### Kokka Number Study

[App page](https://appshunter.io/ios/app/kokka-number-study-number/id6757453069)

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

**In-app purchases:** none


### Skylang

[App page](https://appshunter.io/ios/app/skylang-learn-korean/id6759622643)

Master Korean language and culture through engaging story-based lessons, interactive roleplays, and authentic video clips. Build fluency and confidence with a curriculum developed by an experienced educator, suitable for all learning levels.

**Highlights:** Story-based lessons, Interactive roleplays, Vocabulary building activities, Authentic video clips, AI-powered language tools, Flashcard system

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Skylang Premium (Monthly) | $19.99 | per month |
| Skylang Premium (Annual) | $129.99 | per year |


## Frequently asked questions

### Is Kokka Number Study free?

Kokka Number Study is free to download, with no in-app purchases.

### Is Skylang free?

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

### Do Kokka Number Study or Skylang have ads?

Neither Kokka Number Study nor Skylang shows ads.

### Which is updated more often, Kokka Number Study or Skylang?

Kokka Number Study ships an update every 2 days, and Skylang every 5 days. Most recently, Kokka Number Study was updated on November 9, 2026 and Skylang on October 31, 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.*