A polished Sudoku experience with clean boards, flexible sizes, thoughtful difficulty, and a calm interface that lets the puzzle stay in focus.
Level 1 · 165 XP
SudoZen keeps the classic logic of Sudoku and wraps it in a softer rhythm: gentle colors, fast controls, clean puzzle states, and progression that feels rewarding without getting loud.
Find your calm in every puzzle
Start with a tiny 4x4 warm-up, settle into a classic 9x9 board, or stretch into a 12x12 master puzzle. SudoZen is designed to make every session feel readable, deliberate, and satisfying.
Switch into notes mode, reason through candidates, erase quickly, and keep momentum without visual clutter.
XP, streaks, average time, achievements, and history give players a reason to return without pressure.
Hints, undo, pause, and clear difficulty labels make harder puzzles approachable instead of frustrating.
The game board, home screen, new-game sheet, and advanced boards all follow the same design language: generous spacing, strong grid clarity, and actions that are easy to find at a glance.
Level 1 · 165 XP
New game, daily challenge, stats, achievements, shop, history and settings are separated into clear action zones.
Large numbers, calm controls, visible hints, notes, erase and undo keep the hard puzzle readable.
Shorter boards keep the logic sharp and make SudoZen useful even when there are only a few minutes.
Master boards make the product feel bigger than standard Sudoku without abandoning the calm layout.
The new-game flow gives players a meaningful choice before every round: board size, difficulty, expected duration, and reward multiplier.
A warm-up board for fast wins and first-time players.
Best for 2-5 minutesCompact logic with enough depth to feel satisfying.
Best for short breaksThe core Sudoku board, tuned for clarity and comfort.
Best for regular playAn advanced board for players who want deeper concentration.
Best for long sessions
SudoZen gives players a reason to come back, but keeps the center of gravity on the puzzle: XP, streaks, achievements and history sit around the game, not on top of it.
Everything you need to know before downloading.
Yes. SudoZen is free on both the App Store and Google Play. No upfront cost, no paywall on the core game.
SudoZen offers four sizes: 4×4 Quick for fast warm-ups, 6×6 Focus for short breaks, 9×9 Classic for regular play, and 12×12 Master for deep-focus sessions.
Yes. SudoZen is available on both iOS (App Store) and Android (Google Play). The experience is consistent across platforms.
Every day a new puzzle is available. Completing it earns XP, extends your streak, and logs your solve time in your history. Miss a day and the streak resets — no pressure, just a reason to return.
Yes. SudoZen includes hints, an undo button, notes mode, and an erase tool. Hard puzzles are approachable, not frustrating.
Yes. All puzzles work offline. An internet connection is only needed to sync progress and unlock the daily challenge.
From the Blog
Short reads to help you solve faster, play smarter, and build a habit that sticks.
Rules, logic, board sizes and the habits that turn first-timers into confident solvers.
Read article → GuideScanning, cross-hatching, naked pairs — every technique you need for any difficulty level.
Read article → LifestyleMemory, focus, stress relief and more — what the research says about a daily puzzle habit.
Read article →
NasTech studio
NasTech builds focused mobile apps with practical engineering and a strong eye for day-to-day usability. SudoZen is the first expression of that standard: calm, clean, and made to last.
