Nonagrid — Classic Sudoku

Nonagrid is Sudoku, the way it should be: no ads interrupting your focus, no ambiguous puzzles, just clean logic from the first cell to the last. Fill the 9×9 grid so every row, column, and 3×3 box contains 1 through 9 exactly once. Tap a cell to select it — its row, column, and box highlight automatically — then tap a number to place it. Every puzzle has been checked by a real solver to guarantee a single, logical solution. No guessing, ever. FEATURES • 150 hand-verified puzzles across three difficulties – Gentle (~38 givens), Classic (~30 givens), Sharp (~25 givens) • Guaranteed unique solution on every board — solvable by logic alone • Row/column/box highlighting for the selected cell • Simple number-pad entry, no fiddly typing • Live conflict detection across rows, columns, and boxes • Earn up to three stars per puzzle for efficient solving • Calm graphite-and-jade visuals, easy on the eyes for long sessions • Gentle ambient soundtrack and tactile feedback — both toggleable • Fully offline. No ads, no accounts, no tracking. Progress stays on your device. The classic, done right.