# Duo Blocks vs Simon's Cat World

The clearest difference is in-app purchases: Duo Blocks at none against Simon's Cat World's 10. Duo Blocks also leads on update cadence (daily vs every 6 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Simon's Cat World sells 10 one-off in-app purchases. Duo Blocks asks for nothing beyond the download.

Duo Blocks ships an update daily, Simon's Cat World every 6 days. The most recent releases landed on October 25, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Duo Blocks | Simon's Cat World |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (7 ratings)](https://appshunter.io/ios/app/simons-cat-world/id6803510569/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Daily** | Every 6 days |
| Monetization | — | Free with in-app purchases |
| Size | 25 MB | 477 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Yuki Inaba](https://appshunter.io/developer/1896551072) | [Tactile Games Limited](https://appshunter.io/developer/1400704108) |

## What reviewers say

### Duo Blocks

[App page](https://appshunter.io/ios/app/duo-blocks/id6768885620)

**Features:** macOS Compatibility

**In-app purchases:** none


### Simon's Cat World

[App page](https://appshunter.io/ios/app/simons-cat-world/id6803510569)

Engage in a variety of puzzle games featuring a beloved cat character. Enjoy brain-teasing challenges like sudoku and sorting puzzles, with new content added regularly. Connect with a community of fellow cat enthusiasts through leaderboards and events.

**Highlights:** Variety of puzzle minigames, Cat-themed sudoku, Sorting puzzles, Regularly added new games, Community leaderboards and events, Cozy cat-themed gameplay

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coin Pack | $0.99 | one-time |
| Coin Pack | $1.99 | one-time |
| Coin Pack | $4.99 | one-time |
| Coin Pack | $7.99 | one-time |
| Coin Pack | $9.99 | one-time |
| Coin Pack | $14.99 | one-time |
| Coin Pack | $19.99 | one-time |
| Coin Pack | $29.99 | one-time |
| Coin Pack | $54.99 | one-time |
| Coin Pack | $99.99 | one-time |


## Frequently asked questions

### Is Duo Blocks free?

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

### Is Simon's Cat World free?

Simon's Cat World is free to download, with in-app purchases available.

### Do Duo Blocks or Simon's Cat World have ads?

Neither Duo Blocks nor Simon's Cat World shows ads.

### Which is updated more often, Duo Blocks or Simon's Cat World?

Duo Blocks ships an update daily, and Simon's Cat World every 6 days. Most recently, Duo Blocks was updated on October 25, 2026 and Simon's Cat World on October 29, 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.*