# Catdoku vs Stack Order

The clearest difference is price: Stack Order at Free against Catdoku's $1.99. Stack Order also leads on update cadence (weekly vs every 3 weeks) and iOS requirement (13.0 vs 16.6). Catdoku's advantage is in-app purchases (none vs 2). On ads and device support there is nothing between them.

Stack Order is free to download; Catdoku costs $1.99 up front. Stack Order sells 2 one-off in-app purchases. Catdoku asks for nothing beyond the download.

Catdoku ships an update every 3 weeks, Stack Order weekly. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Catdoku | Stack Order |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/catdoku/id6477891720/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Paid | — |
| Size | 55 MB | 179 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sergio Marin](https://appshunter.io/developer/1731012600) | [Gloryway Puzzle](https://appshunter.io/developer/1853465960) |

## What reviewers say

### Catdoku

[App page](https://appshunter.io/ios/app/catdoku/id6477891720)

This puzzle game reimagines Sudoku by replacing numbers with cute cats. It offers various grid sizes and daily challenges to keep players engaged. Enjoy a relaxing yet mentally stimulating experience with a feline twist.

**Highlights:** Cat-themed Sudoku gameplay, Multiple grid sizes (4x4, 6x6, 9x9), Daily puzzle challenges, Suitable for beginners and pros, Relaxing and mentally stimulating

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

**In-app purchases:** none


### Stack Order

[App page](https://appshunter.io/ios/app/stack-order-card-sort-games/id6762169694)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NoAds | $7.99 | one-time |
| Ad Free Pack | $12.99 | one-time |


## Frequently asked questions

### Is Catdoku free?

Catdoku costs $1.99, with no in-app purchases.

### Is Stack Order free?

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

### Do Catdoku or Stack Order have ads?

Neither Catdoku nor Stack Order shows ads.

### Which is updated more often, Catdoku or Stack Order?

Catdoku ships an update every 3 weeks, and Stack Order weekly. Most recently, Catdoku was updated on November 4, 2026 and Stack Order on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*