Doodle Doku

Fill the grid so every row, column and 3×3 box has the numbers 1 to 9 once each.

How to play

Tap an empty square, then tap a number to write it in.
Every row, every column and every 3×3 box must have 1 to 9, with no repeats.
Turn on Notes to pencil in small guesses. Erase clears a square.
A wrong number is marked in orange and counts as a mistake. Hints fill in one square for you (three per puzzle).
Each puzzle has exactly one answer. Fill the grid to win.