# Cats World vs Unit Converter....

The clearest difference is in-app purchases: Cats World at none against Unit Converter....'s 2. Cats World also leads on ads (none vs shown). Unit Converter....'s advantage is update cadence (every 2 weeks vs every 7 months) and iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. Unit Converter.... sells 2 in-app purchases, starting at $1.99 per month. Cats World asks for nothing beyond the download.

Cats World ships an update every 7 months, Unit Converter.... every 2 weeks. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Cats World | Unit Converter.... |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/cats-world/id6502180606/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 7 months | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 40 MB | 106 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Toprak Kamuran](https://appshunter.io/developer/1738762474) | [Olga Ivanova](https://appshunter.io/developer/1733570435) |

## What reviewers say

### Cats World

[App page](https://appshunter.io/ios/app/cats-world/id6502180606)

Explore detailed information on 78 cat breeds, including activity levels, docility, and trainability. This app offers a selection assistant, health guides, and vaccination management to help you find and care for your ideal feline companion. It supports 9 languages for a global cat-loving community.

**Highlights:** Detailed cat breed information, Cat selection assistant, Vaccination schedule management, Cat health guide, Multilingual support (9 languages)

**Features:** macOS Compatibility

**In-app purchases:** none


### Unit Converter....

[App page](https://appshunter.io/ios/app/unit-converter/id6751115020)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| units_by_oliva_subscription | $1.99 | per month |
| units_by_oliva_donation | $1.99 | one-time |


## Frequently asked questions

### Is Cats World free?

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

### Is Unit Converter.... free?

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

### Do Cats World or Unit Converter.... have ads?

Unit Converter.... shows ads; Cats World does not.

### Which is updated more often, Cats World or Unit Converter....?

Cats World ships an update every 7 months, and Unit Converter.... every 2 weeks. Most recently, Cats World was updated on October 24, 2026 and Unit Converter.... on October 21, 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.*