Features

Only 45KB in size
Supports crosswords up to 15x15 squares and beyond
Able to open crosswords from a variety of formats: The NY Times, The Times, The Guardian, The Independent, The Washington Post, AcrossLite, Crossword Maestro.
Ability to see the whole grid and the current clue
Word definition lookup (on capable phones)
Space available for working on anagrams
Show/hide hyphens
Show/hide word breaks
Check an answer/all answers (when correct answers are stored)
Hinting of incorrect letters
Download crosswords from the Web
Store multiple crosswords (limited only by the phone's memory capacity)
User-definable preferences, including colours, font size, definition lookup URL