ii Sudoku by Color is a simple, intuitive, interactive, and easy to use application.

It offers:
1. Seven puzzle levels - Easiest, Easier, Easy, Medium, Hard, Harder, and Hardest
2. Each puzzle level is methodically determined and explained
3. Ability to switch between Color and Classic modes with single press of a menu icon
4. Interactive or Do No Disturb puzzle check modes
5. Shows and updates possible values with each input (when selected)
6. Hint for difficult cells
7. Undo to clear a mistake
8. Ability to Save puzzle to resume later

It's a stand-alone program with embedded puzzles.
Online access is not necessary.
There are no advertisements.

And it's for everyone!

As an introductory FREE offering, "ii Sudoku by Color 365" includes 20 each of Easiest, Easier and 75 each of Easy to Hardest level puzzles - 415 puzzles in total.

The following ii Sudoku by Color packages offer more puzzles:
ii Sudoku by Color for Kids includes 400 puzzles with emphasis on Easy to Medium level puzzles - FREE
ii Sudoku by Color 1000 includes 1,040 puzzles with even distribution of puzzle levels
ii Sudoku by Color Premium includes more than 4,500 puzzles