Sudoku Friend Challenge

New Training Mode lights up every match and sightline when you tap a digit. Zero ads, 100% offline, and you can race a friend on the same board with just a link.

Sudoku for iPhone with zero ads. It works fully offline. Turn on Training Mode and tap any digit: every matching number lights up, and their rows, columns and boxes are shaded, so you can see where each number can still go. When you're ready, send a friend a link and race the same board.

Training Mode • A free switch in Settings • Tap a digit to light up every match and shade its rows, columns and boxes • Leave it off for a plain board

Play your way • Classic: rows, columns and boxes • Diagonal: both main diagonals must also hold 1–9 • Daily Challenge: one puzzle a day, with a streak • Time Attack: earn stars for speed and accuracy

Challenge a friend Finish a puzzle and send a link. Your friend opens it on their iPhone, sees your time to beat, and plays the same board. No accounts needed.

Built for focus • Easy, Medium and Hard • Notes, undo and hints, and you can keep going after a mistake • Light, dark and calm board themes • Game Center leaderboards and achievements (optional) • Works offline, great on flights

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