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!