# Sudo9

> Train Your Brain Daily

Canonical page: [https://chrome-stats.com/d/id6759557397](https://chrome-stats.com/d/id6759557397)

## Overview

- **ID:** `id6759557397`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** YUPENG ZHA
- **Category:** Puzzle
- **Version:** 1.0
- **Last updated:** 2026-03-03
- **First published:** 2026-03-02
- **Size:** 3.39 MB
- **Data as of:** 2026-09-18
- **Store listing:** [Apple App Store](https://apps.apple.com/kr/app/sudo9/id6759557397?l=en-GB)
- **Privacy policy:** [https://eggplantstudio.wordpress.com/2026/02/27/sudo9-privacy-policy/](https://eggplantstudio.wordpress.com/2026/02/27/sudo9-privacy-policy/)

## Description

New: Daily Challenge mode! Solve a fresh puzzle every day and build your streak!

Sudo9 is a beautifully crafted Sudoku puzzle game designed for players of all skill levels.

FOUR DIFFICULTY LEVELS
From beginner-friendly Easy puzzles to mind-bending Expert challenges — difficulty graded by solving technique, not just the number of clues.

• Easy — Solvable with naked singles
• Medium — Requires hidden single techniques
• Hard — Mixed strategies including pointing pairs
• Expert — Advanced techniques for seasoned solvers

DAILY CHALLENGE
A new puzzle every day. Build your streak and keep your brain sharp.

SMART FEATURES
• Teaching hints that explain the logic, not just the answer
• Notes mode for pencil marks
• Undo/redo for fearless experimentation
• Auto-highlighting of matching numbers
• Clean, distraction-free interface

DESIGNED FOR YOU
• Light and dark mode
• 5 color themes (Purple, Green, Orange, Rose, Cyan)
• Progress tracking across all difficulties
• Sound effects and haptic feedback

Remove ads with a one-time purchase. Your game data stays on your device.

Train your brain. One number at a time.

## Rankings

- #1,043,144 — Overall

## Similar extensions and apps

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- [Sudoku: Daily Brain Workout](https://chrome-stats.com/d/id6748236600) — 4.60 / 5
- [Still Sudoku](https://chrome-stats.com/d/id6756877792)
- [Just Sudoku : Classic Puzzle](https://chrome-stats.com/d/id6762172260)
- [Sudoku: Daily Brain Puzzle](https://chrome-stats.com/d/id6746101283)
- [Puzzle Game - iSudoku](https://chrome-stats.com/d/id6758756789)
- [Sudoku Classic Master](https://chrome-stats.com/d/id6756409463)
- [Sudoku Kuro](https://chrome-stats.com/d/id6759045829)

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6759557397)