What we offer
4 Difficulty Levels
Easy (beginners) → expert (seasoned). Unlimited puzzles at every level.
Daily Puzzle
A new puzzle each day, same for everyone. Compare your solve time with friends.
Pencil Mode
Mark candidate numbers as small notes. Professional Sudoku-solver technique.
Hint + Error Check
Get a hint when stuck. Red warning if you place a wrong number (optional).
Improve Your Sudoku Technique
Sudoku is not just placing numbers — it's logic + pattern recognition. Learn techniques in the in-app training mode:
Naked Singles: when only one number can fit a cell (the other 8 already exist in its row/column/block).
Hidden Singles: when within a region (row/column/3x3 block) a number can only go in one cell.
Naked/Hidden Pairs, Triples: more advanced techniques. Needed at expert level.
X-Wing, Swordfish: advanced techniques essential at expert level.
Stack: Flutter, our own puzzle generator (unlimited unique puzzles), difficulty validation, Firebase backend (daily + score sync), theme system.
Business model: free + ads, premium 5 TL/month — ad-free + all themes + full offline access.
Frequently Asked Questions
Are puzzles really unlimited?
Yes. The generator algorithm produces a new unique puzzle every time — no library-based limit.
Suitable for kids?
Yes. The easy level fits 8+. Develops mathematical logic + patience.
Does it work offline?
Yes. Fully offline. Internet only for daily puzzle + score sync.
Is there a timer?
Yes, each puzzle is timed. Beat your record, climb the national/global leaderboard.