Sudoku Zero — Offline, No Ads

No banner ads. No full-screen interruptions. No "watch a video to continue." Sudoku Zero is built so you can focus on the puzzle. Nothing breaks your concentration mid-game. No account, no sign-in, no email. ■ Works completely offline On a plane, underground, or with no signal — it behaves exactly the same. The app makes no network connections at all, so nothing about you leaves your device. Your history stays on your iPhone. ■ Buy once, done No subscription. No in-app purchases. You'll never hit a paywall for hints. Future updates are included at no extra cost. ■ Three difficulty levels Easy, Medium and Hard. Every puzzle is generated fresh, so you never solve the same board twice. ■ Tools that help you think · Notes — pencil in candidate numbers · Hints — one cell at a time when you're stuck · Undo — take back any move · Highlighting — see the row, column and matching numbers at a glance · Error detection — spot conflicts the moment they happen ■ Pick up where you left off Leave mid-game and it saves automatically. Keep several puzzles going at once and return to whichever you like. ■ Watch yourself improve Best score per difficulty, completion rate and solve times. Filter by the last 7 or 30 days to see your progress. ■ Easy on the eyes Full light and dark mode support, following your system setting. Optimized for both iPhone and iPad. ■ Four languages English · 한국어 · 日本語 · 简体中文 One puzzle on a coffee break. One before bed. If you've been looking for sudoku without the noise, this is it.