Support Center

How do I start a new game?

From the home screen, select your preferred difficulty level (Easy, Medium, or Hard) and tap "New Game" to begin a fresh puzzle.

What difficulty levels are available?

We offer three difficulty levels:
• Easy: Perfect for beginners, with more numbers revealed.
• Medium: A balanced challenge for regular players.
• Hard: For experienced Sudoku enthusiasts seeking a real challenge.

How do I use hints?

Tap the hint button (💡) during gameplay to reveal a correct number for an empty cell. Use hints wisely to learn solving strategies!

Which Sudoku variants can I play?

We offer 27 game modes: Classic 9x9, Killer Sudoku, Sandwich Sudoku, Diagonal Sudoku, Jigsaw Sudoku, Kropki Sudoku, Thermo Sudoku, Arrow Sudoku, Little Killer, Fog of War, Skyscraper, Anti-Knight, Windoku, Odd/Even, Column Indexer, Mega 16x16, and Mini 6x6 versions of most of them — Mini Sandwich, Mini Jigsaw, Mini Kropki, Mini Thermo, Mini Arrow, Mini Fog of War, Mini Skyscraper, Mini Anti-Knight, Mini Windoku and Mini Odd/Even. Column Indexer is the one variant with no Mini version.

Is there sound or music when I play?

Yes — try Chord Mode, an optional musical audio feature available on all 27 variants. Each digit you place plays a note, completing a box or region plays a chord, and solving the puzzle ends on a satisfying cadence. You can set it to Off, On, or Headphones Only, and choose your musical key and instrument voice in Settings.

What is the Daily Challenge?

Every day, a new unique puzzle is available for all players worldwide. Complete daily challenges to build your streak and compete on the leaderboards!

How do I use notes / pencil marks?

Toggle the pencil/notes mode to add small candidate numbers to a cell. This helps you track possible numbers for that spot. Notes automatically update if you enable "Smart Notes" in settings.

Is my progress saved automatically?

Yes! Your game progress is automatically saved. You can close the app and resume your puzzle anytime.

How does iCloud sync work?

Your statistics, completed puzzles, and settings are synced across all your devices signed into the same iCloud account.

What's included in Premium?

Premium unlocks:

• ✨ Unlimited hints
• 🎮 Additional game variants (Diagonal, Killer, Sandwich, Jigsaw, Kropki, Thermo, Arrow, Fog of War, Skyscraper, Anti-Knight, Windoku, Odd/Even, Column Indexer and Mega 16x16)
• 📊 Advanced statistics
• 🚫 Ad-free experience
• 🎨 Exclusive themes

How do I subscribe to Premium?

Tap the Premium button on the home screen or go to Settings to view subscription options.

How do I cancel my subscription?

Subscriptions can be managed through your Apple ID settings:

1. Open the Settings app on your device
2. Tap your name at the top
3. Tap "Subscriptions"
4. Select "Sudoku - Brain Puzzles"
5. Tap "Cancel Subscription"

How do I restore my purchase?

If you've purchased a Premium subscription or Lifetime access but don't see your benefits, go to Settings and tap "Restore Purchases".

How do I reset my progress?

To reset your statistics and game progress, go to Settings > Data Management > Reset Progress. Warning: This cannot be undone.

I found a bug, how do I report it?

We appreciate your help! Please email us at support@sudokubrain.app with details about the issue and screenshots if possible.