Sumi: Zen Sudoku
Contains adsIn-app purchases
Everyone
info
10+
Downloads
Everyone
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About this game
墨 Sumi is sudoku, stripped of noise.
No leaderboards. No streaks that shame you. No timers ticking in your face. Just a nine by nine grid, drawn in warm ink on washipaper, waiting for your next move.
FIVE LEVELS OF PRACTICE
Five difficulties, from your first quiet solve to the edge of mastery. Each level is a different conversation with the grid.
1. Easy and Medium: unhurried, forgiving.
2. Hard: where focus begins to matter.
3. Master and Edo: for those who have earned stillness.
A DAILY HABIT
Open Sumi each day. Solve one puzzle. Watch your streak grow, your times sharpen. The Practice Log tracks your progress with a clean improvement curve. No gamification. Just the graph.
YOUR SEASON, YOUR PALETTE
Choose a season at first launch: Spring, Summer, Autumn, or Winter. Each shifts the accent colour that breathes through the interface. Change it anytime in Settings.
SUMI PRO - Unlock the full practice:
1. The Library: a curated collection of passages from Zen masters, philosophers, and makers. One surfaces each day.
2. Design Zen Sudoku: build a print-ready A5 puzzle book. Pick your difficulty mix, your paper colour, your ink. Export as PDF and
print.
3. Full improvement history and personal bests at every difficulty.
4. No Ads
One-time purchase. No subscription. No renewal.
ABOUT THE NAME
墨 (sumi) is the ink used in traditional Japanese calligraphy and sumi-e painting. Ground from a solid inkstick, mixed with water, applied with patience. The name describes the aesthetic: deliberate, unhurried, lasting.
Ink on paper. No chrome. No noise. Nine by nine, every day.
No leaderboards. No streaks that shame you. No timers ticking in your face. Just a nine by nine grid, drawn in warm ink on washipaper, waiting for your next move.
FIVE LEVELS OF PRACTICE
Five difficulties, from your first quiet solve to the edge of mastery. Each level is a different conversation with the grid.
1. Easy and Medium: unhurried, forgiving.
2. Hard: where focus begins to matter.
3. Master and Edo: for those who have earned stillness.
A DAILY HABIT
Open Sumi each day. Solve one puzzle. Watch your streak grow, your times sharpen. The Practice Log tracks your progress with a clean improvement curve. No gamification. Just the graph.
YOUR SEASON, YOUR PALETTE
Choose a season at first launch: Spring, Summer, Autumn, or Winter. Each shifts the accent colour that breathes through the interface. Change it anytime in Settings.
SUMI PRO - Unlock the full practice:
1. The Library: a curated collection of passages from Zen masters, philosophers, and makers. One surfaces each day.
2. Design Zen Sudoku: build a print-ready A5 puzzle book. Pick your difficulty mix, your paper colour, your ink. Export as PDF and
print.
3. Full improvement history and personal bests at every difficulty.
4. No Ads
One-time purchase. No subscription. No renewal.
ABOUT THE NAME
墨 (sumi) is the ink used in traditional Japanese calligraphy and sumi-e painting. Ground from a solid inkstick, mixed with water, applied with patience. The name describes the aesthetic: deliberate, unhurried, lasting.
Ink on paper. No chrome. No noise. Nine by nine, every day.
A clam and peaceful Sudoku app
Updated on
Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
What’s new
Easier on the eyes.
Pencil marks are bigger now. The small candidate numbers inside each square have grown, so a square full of notes is easy to read at a glance without squinting or zooming.
Small polish under the hood too, so puzzles keep loading quickly.
Pencil marks are bigger now. The small candidate numbers inside each square have grown, so a square full of notes is easy to read at a glance without squinting or zooming.
Small polish under the hood too, so puzzles keep loading quickly.
Everyone
Learn moreApp support
About the developer
KARAN SHARMA
hey@krail.app
9 Nairobi Pl
Toongabbie NSW 2146
Australia
+61 426 287 554
