# KasKalba vs Fern

The clearest difference is update cadence: Fern at every 5 days against KasKalba's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. KasKalba sells 5 in-app purchases, starting at $17.99 per month and Fern sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

KasKalba ships an update every 3 weeks, Fern every 5 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | KasKalba | Fern |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Size | 79 MB | 114 MB |
| Requires iOS | 16.4 | **15.5** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mohammad Yousef Khalil Rabaa](https://appshunter.io/developer/6797941377) | [Alexandr Matrosov](https://appshunter.io/developer/6781019739) |

## What reviewers say

### KasKalba

[App page](https://appshunter.io/ios/app/kaskalba/id6797941375)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium - Monthly | $17.99 | per month |
| Premium - Yearly | $129.99 | per year |
| Constitution - 1 Month | $3.99 | one-time |
| Exam Practice - 1 Week | $8.99 | one-time |
| Exam Practice - 1 Month | $24.99 | one-time |


### Fern

[App page](https://appshunter.io/ios/app/fern-language-flashcards/id6798832919)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fern Pro | $9.99 | one-time |


## Frequently asked questions

### Is KasKalba free?

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

### Is Fern free?

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

### Do KasKalba or Fern have ads?

Neither KasKalba nor Fern shows ads.

### Which is updated more often, KasKalba or Fern?

KasKalba ships an update every 3 weeks, and Fern every 5 days. Most recently, KasKalba was updated on October 31, 2026 and Fern 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.*