Pencilmark Sudoku
Notes, hints & practice
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Pencilmark Sudoku is a focused Sudoku app for players who like solving with notes, patterns, and logic.
Start with classic puzzles, use outer and inner pencil marks, select multiple cells at once, and work through hints that explain the next logical step. Beginner boards emphasize simple scanning and Schneider pairs, while practice puzzles help you sharpen specific techniques.
Features:
- Classic Sudoku puzzles by difficulty
- Fast pencil-mark entry
- Multi-select for marking related cells
- Smart hints with step-by-step logic
- Practice mode for solving techniques
- Auto-checking and conflict highlights
- Portrait and landscape layouts
- Local progress and stats saved on device
No accounts, ads, tracking, or daily streak pressure. Just Sudoku, notes, hints, and practice.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- Added a technique explainer index and linked technique guidance from Quick Start.
- Refined the How to Play instructions and explainer layouts.
- Added responsive explainer boards and kept pencil marks inside their cells.
- Added the final-number single-mark shortcut guidance.
- Fixed the delay after regular taps while supporting the single-mark shortcut.
- Formatted messy code
The developer, Justin Carter, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Justin Carter
- Size
- 25.4 MB
- Category
- Puzzle
- Compatibility
Requires iOS 18.6 or later.
- iPhone
Requires iOS 18.6 or later. - Mac
Requires macOS 15.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 2.6 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Justin Carter