# Rainboku — Sudoku but with colors

> Color-based logic puzzle game with multiplayer and learning features. (iPhone/iPad app by Former Plum LLC.)

- Source: https://appshunter.io/ios/app/rainboku/id6755971720 (this page in markdown: same URL + `.md`)
- Developer: [Former Plum LLC](https://appshunter.io/developer/1844463582)
- Category: Games, Entertainment, Casual, Puzzle
- Price: Free with in-app purchases
- Rating: 5.00/5 from 5 App Store ratings · 3 written reviews indexed
- Age rating: 12+
- Requires: iOS 15.6 · 59 MB
- Languages: English
- Released: 2025-12-09
- Data updated: 2026-06-30
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/rainboku/id6755971720/reviews.md

## What is Rainboku?

Sudoku in color - Each puzzle is a work of art.

It’s the same brain boosting logic you love, transformed into a calm, beautiful, and deeply satisfying experience.

NEW: Play With Friends! Challenge your friends in real-time multiplayer battles. Race to finish the board, compete for the high score, or work together to solve harder puzzles. 

Learn, Don't Just Solve. Stuck? Don't just ask for an answer. Our new smart hint system teaches you why a move is correct. Learn advanced techniques naturally and watch your logic skills flourish.

Pure Zen, No Distractions. Whether you have 5 minutes for a coffee break or an hour to burn, find your zen with a clean, beautiful interface designed to calm your mind while sharpening your brain.

FEATURES:
    • Logic, Not Math: No numbers required. Just pure color deduction.
    • Real-Time Multiplayer: Host private rooms and race your friends or work together.
    • Daily Challenges: A fresh puzzle every day that puts everyone on the same playing field.
    • Smart Teaching: An interactive guide that helps you master the game, from beginner to expert.
    • Stats & Streaks: Track your best times, build your calendar streak, and climb the global leaderboards.
    • Offline Play: No internet? No problem. Rainboku is ready whenever you are.
    • Customize Your Vibe: Unlock curated color palettes and themes to match your mood.

A little logic. A lot of color. Pure calm.

## Key features

- Logic-based color deduction puzzles
- Real-time multiplayer battles
- Smart hint system for learning
- Daily challenges
- Offline play
- Customizable themes

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro Upgrade | $0.99 | one-time |


## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/rainboku/id6755971720/reviews.md

### 5/5 — Great game! Highly recommend!

*2025-12-13, version 1.0.40*

Highly recommend the game to pass the time and go mental activity. Multiplayer with friends was a lot of fun!

### 5/5 — Great fun!

*2025-12-13, version 1.0.40*

Love the colors and functionality-

### 5/5 — Incredible Game

*2025-12-12, version 1.0.37*

Very fun to play. Perfect for passing time and challenging your brain!

## Frequently asked questions about Rainboku

### What is Rainboku?

Rainboku is a logic puzzle game that uses colors instead of numbers. It offers a calming experience with features like real-time multiplayer, a smart hint system to help you learn, and daily challenges.

### Does Rainboku have ads?

No, Rainboku does not contain advertisements. The app is free to play and offers in-app purchases for additional content or features.

### Can I play Rainboku with friends?

Yes, Rainboku features real-time multiplayer where you can host private rooms to race friends or collaborate on puzzles. This allows for competitive and cooperative gameplay.

### How does the smart hint system in Rainboku work?

The smart hint system in Rainboku teaches you why a move is correct, helping you master advanced techniques naturally. It's designed to enhance your logic skills rather than just providing answers.

### Can I play Rainboku offline?

Yes, Rainboku supports offline play. You can enjoy the puzzles and sharpen your brain without needing an internet connection, making it convenient for any time or place.

### What devices is Rainboku available on?

Rainboku is available on iPhone, iPad, and iPod. It is designed for iOS devices, offering a consistent experience across Apple's mobile platforms.

### How often is Rainboku updated?

The latest version of Rainboku is 1.0.59, last updated on January 14, 2026. Updates typically include new features, bug fixes, and performance improvements.

### What is the age rating for Rainboku?

Rainboku has an age rating of 12+. This indicates it is suitable for users aged 12 and older, offering engaging content appropriate for this demographic.

## Version history (last 5 releases)

### 1.0.61 — 2026-06-25

Thanks for playing Rainboku, hope you dig it!
• Multiplayer
• Long press for paint mode
• Updated sounds
• Bug fixes

### 1.0.59 — 2026-01-14

Thanks for playing Rainboku, hope you dig it!
• Long press for paint mode
• Tips and Hints
• Bug fixes

### 1.0.58 — 2026-01-12

• New updated look!
• Bug fixes

Thanks for playing Rainboku, hope you dig it!

### 1.0.67 — 2026-01-08

Thanks for playing Rainboku, hope you dig it!

### 1.0.66 — 2026-01-06

Thanks for playing Rainboku, hope you dig it!

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## More apps by Former Plum LLC

- [The Pack List](https://appshunter.io/ios/app/the-pack-list/id6753695696)

All apps by Former Plum LLC: https://appshunter.io/developer/1844463582

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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 2026-06-30.*