4 difficulty levels, point system, notes and intelligent hints.
> 4 difficulty levels (Easy, Medium, Hard, Expert))
> Highlighting of row, column and box
> Highlighting of possible entries
> Intelligent hints
> Notes with auto erase
> Highscores
> Autosave
> No InAppPurchases
> Play on iPhone, iPad and iPod
> Play horizontal and vertical
HINT: This application is ad-supported by in-game banner at the bottom of the screen.