# Klatt vs KooTreeni

The clearest difference is price: KooTreeni at Free against Klatt's $0.99. KooTreeni also leads on update cadence (every 2 months vs every 18 months) and iOS requirement (13.0 vs 15.6). On ads, in-app purchases and device support there is nothing between them.

KooTreeni is free to download; Klatt costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Klatt ships an update every 18 months, KooTreeni every 2 months. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Klatt | KooTreeni |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 18 months | **Every 2 months** |
| Size | 10 MB | 166 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Anita Koller-Levai](https://appshunter.io/developer/1252394123) | [ArraTreeni Oy](https://appshunter.io/developer/1345435068) |

## What reviewers say

### Klatt

[App page](https://appshunter.io/ios/app/klatt-numbers/id1303132371)

**Features:** macOS Compatibility

**In-app purchases:** none


### KooTreeni

[App page](https://appshunter.io/ios/app/kootreeni/id1541385532)

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

**In-app purchases:** none


## Frequently asked questions

### Is Klatt free?

Klatt costs $0.99, with no in-app purchases.

### Is KooTreeni free?

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

### Do Klatt or KooTreeni have ads?

Neither Klatt nor KooTreeni shows ads.

### Which is updated more often, Klatt or KooTreeni?

Klatt ships an update every 18 months, and KooTreeni every 2 months. Most recently, Klatt was updated on October 26, 2026 and KooTreeni on October 25, 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.*