# TriZen HD Gold vs Catdoku

The clearest difference is price: TriZen HD Gold at Free against Catdoku's $1.99. TriZen HD Gold also leads on ratings volume (84 vs 1) and iOS requirement (10.0 vs 16.6). Catdoku's advantage is in-app purchases (none vs 3) and rating (5.0 vs 4.6). On review sentiment, ads and device support there is nothing between them.

TriZen HD Gold is free to download; Catdoku costs $1.99 up front. TriZen HD Gold sells 3 one-off in-app purchases. Catdoku asks for nothing beyond the download.

Catdoku holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: TriZen HD Gold has 84 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 99% of TriZen HD Gold's written reviews are positive against 100% of Catdoku's.

TriZen HD Gold ships an update every 2 months, Catdoku every 3 weeks. The most recent releases landed on November 1, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | TriZen HD Gold | Catdoku |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [4.6 (84 ratings)](https://appshunter.io/ios/app/trizen-hd-gold/id465342794/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/catdoku/id6477891720/reviews)** |
| Number of ratings | **84** | 1 |
| Positive reviews | 98.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | **Free with in-app purchases** | Paid |
| Best chart rank | — | **#198** |
| Size | 37 MB | 55 MB |
| Requires iOS | **10.0** | 16.6 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Little White Bear Studios, LLC](https://appshunter.io/developer/286331903) | [Sergio Marin](https://appshunter.io/developer/1731012600) |

## What reviewers say

### TriZen HD Gold

[App page](https://appshunter.io/ios/app/trizen-hd-gold/id465342794)

Engage in a relaxing and challenging puzzle game where you fit geometric pieces into a shaded area. With over 500 puzzles, this app offers a long-lasting mental escape. It's a free, ad-supported version of a paid game, including all its puzzles.

**Highlights:** Over 500 puzzles, Tangram-style gameplay, Piece fitting challenges, Puzzle completion recognition, Free access to all puzzles

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 100 Hints | $3.99 | one-time |
| 1,000 Hints | $9.99 | one-time |
| Unlimited Hints | $19.99 | one-time |

**What reviewers like**

- 🧩 Challenging and engaging puzzle gameplay
- 🎵 Relaxing background music and zen atmosphere
- 🎨 Colorful and attractive visual design
- 🧠 Excellent for spatial reasoning and mental exercise
- 💰 Generous free content with 500 free hints

**What reviewers complain about**

- ⚠️ Inappropriate ad content (pornographic advertisement)
- 💸 Limited free hints requiring paid purchases
- 🎮 Piece rotation controls could be more intuitive
- 🎵 Repetitive background music

**Reported bugs**

- Inappropriate adult content in advertisements

**Requested features**

- Sequel or extension (Tan Zen #2)
- More varied music tracks and tones
- Easier piece rotation mechanism


### Catdoku

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

**Currently charting:** #198 Top Paid · Casual (US App Store)

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


## Frequently asked questions

### Is TriZen HD Gold free?

TriZen HD Gold is free to download, with in-app purchases available.

### Is Catdoku free?

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

### Which has better reviews, TriZen HD Gold or Catdoku?

Catdoku is rated higher. TriZen HD Gold averages 4.6 out of 5 from 84 ratings, while Catdoku averages 5.0 from 1 ratings.

### Do TriZen HD Gold or Catdoku have ads?

Neither TriZen HD Gold nor Catdoku shows ads.

### Which is updated more often, TriZen HD Gold or Catdoku?

TriZen HD Gold ships an update every 2 months, and Catdoku every 3 weeks. Most recently, TriZen HD Gold was updated on November 1, 2026 and Catdoku on November 8, 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.*