Beautiful and Calming
A beautiful game. Calm and focused. This is a game which helps me calm down when my mind has just gone through a hectic day. It helps me to be clear present and centered.
Free
In-App PurchasesWith Ads
About
This app offers a minimalist Sudoku experience focused on quiet contemplation and daily practice. It features five difficulty levels, a practice log, and customizable seasonal color palettes. An optional one-time purchase unlocks additional content and features.
✓Minimalist Sudoku interface
✓Five difficulty levels
✓Daily puzzle practice
✓Progress tracking log
✓Seasonal color themes
✓Printable puzzle book creation (Pro)
✓Zen master quotes (Pro)
Show original description
What's New in Sumi
1.4
July 26, 2026
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.
More1
In-App Purchases
$2.99
Sumi Pro
No ads. All features. One-time purchase.
User reviews
Developer apps
FAQ
Does Sumi have ads?
Yes, the free version of Sumi contains advertisements. Users can remove ads by purchasing Sumi Pro, which is a one-time purchase.
What is the short name for Sumi: Zen Sudoku?
The short common name for Sumi: Zen Sudoku is Sumi. This is derived by removing the subtitle and colon from the full app name.
How many difficulty levels does Sumi offer?
Sumi offers five distinct difficulty levels for Sudoku puzzles: Easy, Medium, Hard, Master, and Edo. These levels cater to a range of player skills, from beginners to advanced players.
Can I play Sumi offline?
The provided data does not specify whether Sumi can be played offline. However, many Sudoku games offer offline functionality for their core puzzles.
What is included in Sumi Pro?
Sumi Pro unlocks The Library of Zen master quotes, allows you to design and export a print-ready Sudoku puzzle book, provides full improvement history, and removes all ads. It is a one-time purchase.
What devices is Sumi available on?
Sumi is available on iPhone and iPad devices. The app is rated for ages 4 and up.
How often is Sumi updated?
Sumi was last updated on July 26, 2026, with version 1.4. This indicates a relatively recent update, suggesting ongoing support and development.
What is the main appeal of Sumi compared to other Sudoku apps?
Sumi's main appeal lies in its minimalist, noise-free design, focusing on a calm and deliberate Sudoku experience. It avoids common gamification elements like leaderboards and streaks, emphasizing quiet practice and aesthetic design.
