Available on App Store

Sudoku Fun Go - Classic Sudoku

9×9 Sudoku Puzzle Game

A classic 9×9 Sudoku game built with Flutter for iOS and Android. Four difficulty levels (Easy, Medium, Hard, Expert), optional notes and hints, undo/erase, running timer, and persistent statistics. Fully localized in 12 languages. Game Center and Play Games leaderboards and achievements.

Key Features

Difficulty Levels

Choose your challenge with four difficulty levels

• Easy
• Medium
• Hard
• Expert

Notes, Hints & Tools

Full set of tools to help you solve puzzles

• Notes mode for pencil candidates
• Hints for the selected cell
• Undo and erase
• Running timer
• Mistake counter

Statistics

Track your progress and improve

• Games won and win rate
• Best times per difficulty
• Best scores per difficulty
• Current and best streaks
• Total games and play time

12 Languages

Fully localized with regional variants

• English, Hebrew (RTL), Arabic (RTL)
• German, Spanish, French, Italian
• Portuguese, Russian, Japanese
• Korean, Chinese
• 17 regional variants (e.g. pt-BR, es-MX)

Leaderboards & Achievements

Compete and unlock achievements

• Game Center (iOS) & Play Games (Android)
• Friends and Global leaderboards
• Best score leaderboards
• First win, Streak 5, Streak 10 achievements

Screenshots

Real app screens from Sudoku Fun Go - Classic Sudoku.

App screens

New puzzle — sudoku puzzle — New puzzle
Pick difficulty and start a fresh grid.

Gameplay — sudoku puzzle — Gameplay
Fill the grid with notes and smart hints.

Victory — sudoku puzzle — Victory
Celebrate completion with time and stats.

Statistics — sudoku puzzle — Statistics
Track wins, streaks, and best times.

How to use

Select difficulty

Easy to expert — find the level that fits you.

Fill the grid

Tap cells, use notes, and avoid duplicate digits per row, column, and box.

Use hints wisely

Hints help when stuck without spoiling the whole puzzle.

Finish & improve

Complete puzzles to grow your stats and streaks.

Frequently asked questions

Quick answers about features, privacy, and billing.

Do I need an account?+

No. Open the app and tap New Game. Game Center (iOS) or Google Play Games (Android) is optional for leaderboards and achievements.

Is the app free?+

Yes. Sudoku Fun Go is free to download and play. Ads support development. You can remove ads with a one-time in-app purchase.

Which devices are supported?+

iPhone and iPad (iOS), and Android phones and tablets with Google Play services. Requires a recent OS version — see the store listing for details.

What are the difficulty levels?+

| Level | For whom | |-------|----------| | Easy | Beginners — fewer empty cells | | Medium | Balanced daily challenge | | Hard | Experienced solvers | | Expert | Maximum empty cells — bravest players only |

Can I pause mid-game?+

Yes. Tap pause; the timer stops until you resume. Your puzzle is saved automatically.

What happens if I quit?+

If you leave without finishing, that puzzle’s progress is lost. Use Continue Game on the home screen to return to an in-progress puzzle.

How do notes work?+

Turn on Notes, tap a cell, then tap digits to mark candidates. When you place a confirmed number, matching notes in the row, column, and box can auto-clear (if enabled in Settings).

Do hints hurt my score?+

Yes. Each hint costs 300 points from your final score. Use them when stuck, but fewer hints = higher rank.

How many mistakes are allowed?+

Mistakes are tracked and reduce your score (−500 each). The puzzle does not end on a wrong entry — you can keep solving.

How is my score calculated?+

Base = 10,000 × difficulty multiplier (Easy ×1, Medium ×2, Hard ×3, Expert ×5) Minus 2 points per second, 500 per mistake, 300 per hint. Example: Expert, 10 minutes, 0 mistakes, 0 hints → up to 48,800 before time penalty details.

Why is my leaderboard empty?+

Sign in to Game Center or Play Games, complete a puzzle to submit a score, then open Statistics → Friends or Global. Install from the Play Store or App Store (not sideload) for full Play Games / billing support on Android.

How do achievements unlock?+

Automatically when you meet goals (first win, streaks, flawless solve, etc.). Open Statistics → Achievements to view progress.

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