Rainboku

Former Plum

In-app purchases

About this game

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 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.

What’s new

Thanks for playing Rainboku, hope you dig it!

• New Daily Puzzle every morning, challenge yourself or a friend!
• Multiplayer lobby, rematch, and stats
• Long press for paint mode
• Tips and Hints
• Bug fixes