AFK Sudoku app for iPhone and iPad

AFK Sudoku is a logic-based placement puzzle, also known as Number Place. The aim of the puzzle is to enter a numerical digit from 1 through 9 in each cell of a 9x9 grid made up of 3x3 sub grids, starting with various digits given in some cells. Each row, column, and region must contain only one instance of each numeral. Completing the puzzle requires patience and logical ability.

Features:

Unlimited supply of proper Sudoku puzzles
Puzzles can be solved with logic, no guessing needed
Daily & Nightly Sudoku challenge
Hint option
Option to automatically update notes as you solve
Undo function
Multiple color schemes available
Option to disable showing mistakes
Option to not display a timer
Online ranking, compete with players worldwide