Pocket Puzzles & Ink Tracing

I made a sudoku book small enough to live in your bag: a hundred puzzles, and a drawing to trace on the page next to each one. It's what I reach for when I want to stop thinking for a while. Now it's an app too, made for iPhone Duo.

On the open Duo, a book opens as a spread, like paper: the puzzle on one page, the drawing on the other. Fold the Duo shut and the book's cover shows on the outside.

WHAT'S INSIDE
• Free Samples: a puzzle from every book, free.
• Pocket Sudoku Vol. 1: 100 new medium sudoku, each beside a drawing from the paperback to trace.
• New books as I make them, each sold on its own.

SOLVING
• Pick a cell, then a digit. Hold a digit to pencil it in as a note.
• Stuck? Check your answers, or reveal one cell or the whole puzzle. Each asks first, so nothing gives the answer away by accident.

TRACING
• Five pens: Brush Pen, Ink Pen, Fineliner, Watercolour and Airbrush, each in five sizes.
• Any colour, and effect inks: Glitter, Rose Gold, Silver, Midnight and Holographic.
• Undo, Redo and an eraser.
• Zoom in with two fingers for the fine lines.

YOURS
• No account needed. Sign in with Apple only if you want your purchases on another iPhone.
• Your ink and answers stay on your iPhone, backed up to your own iCloud. No ads, no tracking.

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