Opensudoku is an open-source Android sudoku application, Materially designed.
here I suggest to add statistics feature and sound feature. to make it easier and safer for users to use this app.
the benefits of this statistcs feature is to make it easier for users to re-view the results of all games that have been in play, and the benefits of this sound feature is to be able to activate the sound game or music when the game is in play.