Sudoku by Wren

A calm, classic sudoku with nothing in the way. • No ads, ever. No purchases, no account. • No mistake limit — play at your own pace. • Every puzzle has exactly one solution, so you never have to guess. • Four levels: Easy, Medium, Hard, Expert. • Pencil notes that tidy themselves, undo, and a hint when you're stuck. • Mistake checking is optional — off by default for the full challenge. • Works offline. Your games never leave your iPhone. Privacy policy: https://moecui22.github.io/wren/privacy/