Sudoku Pencil

Write digits with Apple Pencil, learn the reasoning behind each move, and keep a private notebook of the techniques you practise.

Sudoku Pencil turns a classic Sudoku board into a focused, handwritten logic notebook.

Select an empty cell and write a full-sized digit or a small candidate mark with Apple Pencil. A quick horizontal scratch works as an eraser. On iPhone or when a Pencil is not available, the same writing pad works with touch.

When you get stuck, the built-in Coach does more than reveal an answer. It identifies the next logical idea, explains why it works, highlights the row, column, and box to study, and shows the relevant candidate marks.

Your Learning Notebook stays on your device and records the techniques you have studied, Pencil entries, reviewed mistakes, completed puzzles, and personal best times.

Features:

• Apple Pencil and touch handwriting input
• Large-number and small candidate-mark writing modes
• Horizontal scratch-to-erase gesture
• Technique-based Coach with step-by-step explanations
• Naked-single and hidden-single guidance
• Candidate-map guidance when a direct placement is not available
• Private Learning Notebook with practice history and personal bests
• Easy, Medium, and Hard uniquely generated puzzles
• Notes mode and automatic peer-note cleanup
• Timer and automatic local progress saving
• No account required

Sudoku Pencil includes banner advertising. Technique coaching is free and never requires watching an advertisement.