The download button opens the iTunes App Store, where you
may continue the download process. You must have iTunes installed with an
active iTunes account in order to download and install the software. This
download may not be available in some countries.
From Frozen Swamp Software:
Swamp Numbers is a free program that helps you solve Sudoku puzzles. You can either work puzzles that it generates or puzzles that you enter from a book or newspaper.If you need helping solving the puzzles, simply enable Swamp Numbers hint capabilities. You can either have Swamp Numbers simply identify errors you make or ask for hints when you are stuck. For difficult puzzles, Swamp Numbers allows you to enter candidate values in each cell to help you apply more advanced solution techniques.When working puzzles generated by Swamp Numbers, ten levels are available ranging from simple puzzles to those that will challenge experienced solvers. Swamp Numbers places no limit on the number of puzzles you generate.
"Fill Easy Squares" feature that automatically solves "obvious" parts of an entered puzzle to quickly get you to the interesting parts of the puzzle. Ability to hide candidates for squares to provide a less cluttered view. Undo/Redo support. "One Flick Entry" using a single gesture to select a square and a number to enter in that square. iPad Support. Timer stopped when puzzle is not visible. "Incremental Hint Feature" provides step-by-step hints for difficult puzzles. "Hint Lines" visually indicate hints.