CompareOpen in Google PlayApp info
- Installs
- 100+
- Category
- Puzzle
- Content rating
- Everyone
- Version
- 1.0.1
- Released
- Jul 13, 2026
- Last updated
- 30 Sept 2026
- In-app purchases
- No
- Contains ads
- No
- Promo video
- No
- Requires Android
- 7.0
Screenshots
Rankings
This app isn't in any of our charts yet.
What's newin version 1.0.1
Try Daily Deduction, a daily one-move logic challenge. Race nearby Android friends on the same Sudoku puzzle, with optional live progress. Share completed puzzles by link or QR code and compare results. Earn coins through puzzles, streaks, and achievements to unlock themes and alternate app icons. This release also improves nearby permissions, race discovery feedback, and reminder notifications.
About this app
Daily Sudoku with guided logic, puzzle challenges, and themes.
Read full description
Square One brings daily Sudoku, guided solving, and fresh puzzles into a calm, focused space. Play solo offline, or share a puzzle link when you want to challenge a friend. LEARN AS YOU SOLVE A short illustrated guide introduces the rules. During a puzzle, Learn explains a logical next step on your board. Practise Naked Singles, Hidden Singles, Naked Pairs, and Box-Line reductions at your own pace. A PUZZLE FOR EVERY DAY Solve the daily board, build a streak, and review your completed daily puzzle. Choose Easy, Medium, Hard, or Expert for a new board whenever you like. Every generated puzzle has one solution. MAKE IT YOURS Use pencil notes, smart highlighting, zoom, undo, and hints. Track solve times, scores, achievements, and technique progress. Earn coins by completing distinct puzzles, then use them to unlock color themes and alternate app icons. Preview a theme before choosing it. CHALLENGE A FRIEND Share a puzzle link or QR code so someone else can try the same board and beat your time. YOUR PACE, YOUR SPACE Solo puzzles work offline. Square One has no ads, no third-party analytics, and no account system of its own. Puzzles and settings are stored on your device. If you sign in to supported platform game services, some progress and achievements may sync across devices. Optional reminders are scheduled on your device.