Square One: Daily Sudoku

Square One is a classic sudoku game with nothing in the way. No ads, no accounts, no tracking. Every sudoku puzzle is generated on your device and works fully offline.

DAILY SUDOKU CHALLENGE
Everyone gets the same daily sudoku board. Solve it, build your streak, and come back tomorrow. A live countdown shows when the next daily puzzle drops.

UNLIMITED FREE SUDOKU PUZZLES
Generate fresh sudoku boards whenever you like across four difficulty levels: easy sudoku for a quick warm up, medium and hard sudoku for a proper challenge, and expert sudoku for serious solvers. Every puzzle has a guaranteed unique solution.

A LOGIC GAME BUILT FOR SOLVING
- Smart highlighting for rows, columns, boxes and matching numbers
- Pencil marks and notes that auto-clear as you place digits
- Pinch to zoom with precise cell selection
- Three hints per game, undo, erase and board reset
- Manual checking: mistakes only show when you ask
- Haptic feedback, pausable timer, live score

BRAIN TRAINING THAT STICKS
- 18 achievements across milestones, streaks, difficulty and mastery
- Daily streak tracking with current and best streaks
- Personal bests for time and score at every level
- Lifetime stats, win rates and average solve times

OFFLINE AND TRULY PRIVATE
This sudoku game needs no internet connection. Everything is stored on your device: no logins, no servers, no analytics, no ads, ever. Optional daily reminders are scheduled locally on your phone.

Free sudoku, done properly. Download Square One and start today's puzzle.