Sudoku Labs

Sudoku Labs is built for players who want clean, fast, distraction-free Sudoku. No ads. No accounts. No subscriptions. Just pure Sudoku. • Six difficulty tiers: Very Easy, Easy, Medium, Hard, Expert (Premium) and Extreme (Premium) • One global daily puzzle — the same challenge for everyone, every day • Smart pencil notes • Conflict highlighting • Optional mistake detection • Unlimited undo/redo • Offline play — no internet required • Puzzle history library Premium unlock gives you: • Expert & Extreme difficulty • +2 hints per difficulty • Increased mistake allowance • One-time purchase — no subscription, ever • Support independent development — no subscriptions, ever. Designed for focus. Built for performance. If you love Sudoku without clutter, this is your app.