Paper Sudoku – Handwriting recognition for faster Sudoku solving

Summary: Paper Sudoku uses AI-powered handwriting recognition to let users draw numbers directly on the grid, eliminating the need to tap number pads. This reduces context switching and improves solving speed while tracking notes, streaks, and detailed stats.

What it does

It enables users to input numbers by drawing them naturally with their finger, using an image classification model based on Apple’s Core ML for instant recognition. Additional features include notes, streak tracking, resume-anytime, and detailed statistics.

Who it's for

It is designed for Sudoku players seeking faster, more fluid puzzle solving without UI interruptions, especially those practicing to improve or maintain streaks.

Why it matters

By removing the need to switch attention between the grid and number pads, it reduces input friction and helps users maintain focus and flow during Sudoku puzzles.