Tap a square to select it; a tap that lands just beside a square still counts. Tap the selected square again, or use the Across and Down buttons, to change which way you are typing, and the highlighted squares show the word. The big arrows beside the clue move to the next unsolved clue.

The four buttons beside the grid check your letters or show an answer. Checking happens right away. Showing a letter or a word asks you to confirm first, so a slip of the finger does nothing. The All clues button shows every clue full screen. The Bigger and Smaller buttons beside the grid change the size of the squares. When the squares are bigger than the screen, the grid follows the square you are on, and you can slide it with one finger. The size you choose is remembered for every puzzle.

Classic grids you have solved do not come up again until you have solved the whole set, and themed puzzles favor answers you have not had in a finished puzzle.

Your place is saved automatically. Starting another puzzle keeps the unfinished one in a list on this screen, up to twelve, so you can go back to it.

Wrong letters are not accepted unless you change that in the settings: they can also be shown in red, or allowed, which is how a paper crossword works. The Check buttons appear only when wrong letters are allowed. Puzzle size and first letters apply from the next puzzle you start.

Themed puzzles are built fresh each time from hand-written clues. Classic grids are dense, newspaper-style grids; their clues are dictionary definitions adapted from WordNet (Princeton University).

Solved!