Over 500 puzzles. Each has been hand made and checked to have only one unique solution - guaranteed! All clues are free and ads are opt-in only ✔️ Auto game saves ✔️ Auto pen or pencil notes ✔️ Auto pencil history ✔️ Auto puzzle error checks ✔️ Group total combinations helper ✔️ Play offline ✈️ Created by sudoku fans for sudoku fans!
