Fadak Sudoku

One square at a time. At your pace. Fadak Sudoku helps you understand why a number belongs in a square, as well as finding the answer. • 1,200 puzzles across four levels, from Easy to Expert • A separate daily challenge for each scheduled date • 16 lessons and 32 exercises, from the rules to X-Wing, Y-Wing and Swordfish • Hints that separate where to look, the reasoning, and the action • Cell-first or number-first input, notes, batch notes, marks, undo and redo • Named puzzle bookmarks and file backup and restore • Light, dark, system and high-contrast themes, plus large cell input • English and Korean, with offline puzzles, lessons and local saves No ads appear while you solve a puzzle or read a hint. An ad may appear when you move to the next puzzle after some regular completions; the button tells you beforehand. All puzzles, lessons and solving tools are free. An optional one-time purchase removes ads. It is not a subscription. Purchases and purchase restoration require a Google Play connection. Your progress stays on your device. Export a backup before changing devices or uninstalling the app. Restore purchases using the same Google Play account.