Settings

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Appearance

Dark themeColour-blind modeBlue tone + dashed outline on errors instead of red.

Gameplay

Auto-pencilClear candidate marks automatically when a digit is placed.Hide timerCelebrate on solveA little animation on a win (muted with “reduced motion”).Number-first inputPick a number, then fill cells by tapping them.

Hitori

Auto-mark neighboursAuto-ring the neighbours of black cells as “white”.Highlight duplicatesHighlight numbers that still repeat in a row or column.

Shuffle

Mark correct sumsMark rows and columns that hit their sum.