Chrome-8

"It is simple, interesting and as challenging as any puzzle game can get." (iPhone Footprint)
"In Chrome-8 you get what you see - a pure puzzle experience that plays perfectly and is free of almost all excess fat." (App Spy)
Chrome-8 is a UNIQUE logic game that is really going to bake your noodle! Unlike many other games, Chrome-8 will offer you the sheer pleasure of concentration. Be it for a minute, or for hours on end.

Chrome-8
* is available in English, French, Chinese, and Japanese
* has an Apprentice and a Master mode
* saves/restores the complete game state
* provides benchmarking for each puzzle (minimum number of moves required)
* provides hints in advanced mode
* is Game Center connected
* is unique!

Site: http://www.chrome-8.com/