Open Sudoku app analytics for December 23

Features: • Without ads • Puzzles can be downloaded from web, entered by hand or generated on the project's homepage • Game stats (time spent, mistakes) • Next step hints with multiple strategies suggestions • Import to and export from a file • Visual themes including custom theme editor • Several input modes (finger-friendly numpad, popup, keyboard etc.) • Double pencil marks …and much more. More information (including how to report ideas and issues) can be found on the project's home page: http://opensudoku.moire.org