Einstein Sudoku app for iPhone and iPad

Einstein Sudoku is a logic puzzle game similar to Sudoku but using picture icons instead of numbers. The puzzles ask the player to solve "who lives in what house, eats what food, drinks what drink, etc" based on visual clues or facts given about the puzzle. There are an unlimited number of puzzles with different sizes (4x4, 5x5, 6x6), 2 levels of difficulty as well as a challenge mode for each that asks a simple question like "Who drinks the water?". Each puzzle started by the player has a unique solution with a set of clues given to help the player solve the puzzle. Clues can be queried by players to explain the meaning of each. Players can also "take a clue" which allows them to make progress with the puzzle, but with a time penalty added to the score.