# CoKu — A colorful twist on Sudoku!

> Color-based Sudoku puzzle game with modern design and multiple game modes. (iPhone/iPad app by Frank J Guzzone.)

- Source: https://appshunter.io/ios/app/coku/id6740406917 (this page in markdown: same URL + `.md`)
- Developer: [Frank J Guzzone](https://appshunter.io/developer/1789786093)
- Category: Games, Puzzle, Strategy
- Price: Free with in-app purchases
- Rating: 5.00/5 from 3 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 17.6 · 15 MB
- Languages: American English
- Released: 2025-01-20
- Data updated: 2026-06-04
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/coku/id6740406917/reviews.md

## What is CoKu?

Welcome to CoKu, where classic Sudoku meets color-based strategy in a clean, modern puzzle experience.


This latest build adds Daily Challenge, new Mini Game modes for quick sessions, and Draw Mode so you can create your own colorful boards. It also includes smoother gameplay, UI polish, and performance improvements.


Instead of numbers, CoKu uses colors. Complete every row, column, and block with no repeated color in any section. It is easy to learn, visually clear, and satisfying to master.
As you play, you earn stars by completing puzzles and can earn time bonuses for faster solves. Use stars to unlock helpful tools and improve your performance over time.


CoKu includes Easy, Medium, and Hard difficulty levels so you can choose a pace that fits your style, from relaxed practice to advanced challenge.

The experience is designed to feel responsive and polished, with intuitive touch controls, haptic feedback, dynamic scoring, and progress tracking in a dark-mode-optimized interface.

## Key features

- Color-based Sudoku gameplay
- Daily Challenge mode
- Mini Game modes
- Draw Mode for custom boards
- Multiple difficulty levels
- Unlockable tools and bonuses
- Dark mode optimization

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| 500 Stars | $0.99 | one-time |
| 5,000 Stars | $4.99 | one-time |
| 2,500 Stars | $2.99 | one-time |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/coku/id6740406917/reviews.md

### 5/5 — Fun and relaxing!

*2025-04-10*

This has been one of my go to games at work for a while. It’s really nice to play whenever i need a small break. As someone who looks at spreadsheets w numbers all day, this colorful number free take on sudoku is so nice. It’s really calming and quiets all the noise in my brain. Highly reccomend!!

## Frequently asked questions about CoKu

### What is CoKu?

CoKu is a puzzle game that offers a colorful twist on classic Sudoku. Instead of numbers, players use colors to complete rows, columns, and blocks without repetition.

### Does CoKu have ads?

No, CoKu does not contain advertisements. The app is free to download and play, with optional in-app purchases available.

### What are the game modes in CoKu?

CoKu features a Daily Challenge, quick Mini Game modes, and a Draw Mode where you can create your own colorful boards.

### What difficulty levels are available in CoKu?

CoKu offers Easy, Medium, and Hard difficulty levels, allowing players to choose a pace that suits their skill and preference, from relaxed practice to advanced challenges.

### How does CoKu track progress?

As you play CoKu, you earn stars by completing puzzles and can unlock helpful tools. The game also features dynamic scoring and progress tracking.

### What devices can I play CoKu on?

CoKu is available on iPhone and iPad, offering a responsive and polished experience with intuitive touch controls and haptic feedback.

### When was CoKu last updated?

The latest version of CoKu, 1.0.4, was last updated on March 3, 2026. The app was initially released on January 20, 2025.

### What is the age rating for CoKu?

CoKu has an age rating of 4+, making it suitable for a wide range of players interested in logic and color-based puzzles.

## Version history (last 3 releases)

### 1.0.4 — 2026-03-03

This update introduces Daily Challenge for a fresh puzzle every day, adds new Mini Game modes for quick sessions, and includes smoother gameplay, UI polish, and performance improvements. It also adds Draw Mode, where you can create your own colorful sudoku-style boards and play your way.

### 1.0.2 — 2025-01-26

Version [1.0.2]:

• New Scoring System: Enhanced time-based rewards for faster completions
• Star Bank Store: Added in-app purchases for additional stars
• Tutorial Improvements: New swipeable tutorial with visual guides

• UI Enhancements:
  - Modernized store design with custom artwork
  - Improved haptic feedback throughout the game
  - Enhanced visual feedback for game actions
• Performance Improvements and Bug Fixes

### 1.0.1 — 2025-01-20

No release notes.

## Apps similar to CoKu

| App | Rating | Price | Category |
| --- | --- | --- | --- |
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| [Sudokool: Fast-Paced Sudoku](https://appshunter.io/ios/app/sudokool-fast-paced-sudoku/id6744809192) | 5.0 (9) | Free | Games |
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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*