Sudoku Slate
Classic number logic, calm
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
A quiet place to solve sudoku.
Sudoku Slate grades its puzzles by the hardest technique they actually require, not by counting how many digits are showing. Clue count is a poor measure. A grid with 28 clues can be trivial or brutal depending on what it asks of you, so this one asks a better question: what do you actually have to know to finish it?
FOUR HONEST DIFFICULTIES
Gentle needs only naked singles. A cup of tea.
Steady introduces hidden singles. The everyday grid.
Sharp calls for pointing and claiming.
Severe requires naked and hidden pairs.
If a puzzle cannot be finished by reasoning, it is thrown away rather than shipped to you. You will never need to guess, and you will never hit a wall that has no logical way through.
ONE SOLUTION, ALWAYS
Every puzzle is verified to have exactly one answer before it reaches you. Not usually. Every time.
BUILT FOR ACTUAL SOLVING
Pencil marks with a proper three-by-three layout inside each cell.
Undo, as far back as you like.
Tap any cell to light up its row, column, and box, with every matching digit picked out across the grid.
A number pad that tells you how many of each digit are still unplaced.
A timer you can pause, which pauses itself when you leave.
MISTAKES ARE NOT A PUNISHMENT
Three mistakes does not end your puzzle. You are offered a way to carry on. Losing twenty minutes of careful work to a counter is not our idea of a good time.
QUIET BY DESIGN
No cartoon celebrations. No streak nagging. No daily login rewards. Slate and indigo, serif numerals, and enough contrast to read comfortably. It is meant to feel like a well-set newspaper puzzle, not a slot machine.
WORKS ANYWHERE
Puzzles are generated on your device, so there is nothing to download and nothing to wait for. Play on a plane, on the underground, or with the signal off.
Your progress is saved on your device. There is no account to make and nothing to sign in to.
Free, supported by ads. No in-app purchases.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Small fixes and polish. Thanks for playing!
The developer, KLR WEB SOLUTIONS LLC, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- KLR WEB SOLUTIONS LLC
- Size
- 4.6 MB
- Category
- Puzzle
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - Mac
Requires macOS 13.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- Copyright
- © 2026 KLR Web Solutions LLC