Sudoku Atlas is Sudoku without the noise. No ads. No pop-ups. No accounts. No internet. Just you and the grid — from a gentle 4×4 up to a monumental 25×25. Buy it once, own it forever, play it offline on your terms.

One purchase. Every puzzle. Zero noise.

Sudoku Atlas is a premium, distraction-free Sudoku app built for people who
actually love the puzzle. There are no ads, no in-app purchases, no accounts,
and no tracking — the app never touches the network. You pay once and own the
whole thing, forever, fully offline.

From 4×4 to 25×25

Most Sudoku apps give you one grid size. Sudoku Atlas gives you eleven, spanning
a huge difficulty range:

• Warm up on tiny 4×4 and 6×6 boards.
  
• Settle into the classic 9×9.
  
• Push into 12×12 and 16×16 for a serious session.
  
• Take on the sprawling 25×25 when you want to disappear into a puzzle for an
  hour.

Every board is generated deterministically from a seed, so a puzzle always has
exactly one solution — and the same puzzle is genuinely the same puzzle, every
time.

Built for focus

• Clean, minimalist interface that stays out of your way.
  
• Pencil marks, one-tap undo/redo, and hints when you want them — never forced.
  
• Your progress, settings, and statistics live entirely on your device.
  
• No timers shouting at you. Play fast, or don't.

Play it your way

• Mouse, keyboard, or touch — each one on its own is enough to play the
  entire game. Full keyboard control (arrow keys, number entry, pencil mode,
  undo/redo, hints) for desktop purists; complete touch control for 2-in-1s, touch
  monitors, and Steam Deck.
  
• High-contrast theme for low-vision play.
  
• Colorblind-friendly by design — color is never the only signal;
  shapes, borders, and underlines carry the same information.
  
• Respects your system text size and ships a full screen-reader label
  tree.

Private by principle

Sudoku Atlas makes zero network requests. There is no analytics, no advertising,
and no crash reporting. Nothing you do in the app leaves your device. It's a
Sudoku game that treats "we don't collect your data" as a feature, not fine
print.

Who it's for

Whether you solve one 9×9 with your morning coffee or lose an evening to a 25×25,
Sudoku Atlas is the calm, permanent, respectful Sudoku app you keep coming back
to.