9 digits - sudoku variations

The best user interface I have ever seen in a Sudoku game. The use of color and position to stimulate additional parts of the brain is a great plus

I love love love puzzles and I've never found another game that's so thoroughly challenging and logical in nature. It's a shame it isn't more popular!

Looks much more fun and colorful than most sudoku apps and has a good selection of games and an intuitive pencil mark interface

Nice app otherwise.

This is a real tool for players that are serious about Sudoku. There are many many puzzles at many skill levels. The amazing, amazing hint system actually teaches you how to play better. The app is super smooth and responsive at all times. No competition.

Took a bit to get used to putting numbers in cells. Very much worth it. Great sudoku game. My favorite

I love this app. It is well organized, easy to use and extremely addicting

This deserves to be more popular! Lots of puzzles in the App Store are computer-generated, but you can tell these are handmade. Excellent! Interface is clean and professional. Optional hints for those who like, and those who don't can shut the hint system off. This is the best KenKen I've found so far. It's nice to have Killer Sudoku included also. I hope that a future release might include larger KenKen (up to 9 by 9 would be super, and fitting with the "9 digits" name) and maybe a re-skin choice. I can see why Mr. Wagner went for colored digits, but I usually prefer a black-on-white scheme. Update: I bought several of the extra puzzle packs when they cost a few dollars. Well worth it. Now that the dev has generously made them free, this app gives you a large number of really nice puzzles. Very kind!

Love this app. So many different variations on sudoku plus the ken-ken ones. Difficulty is definitely more challenging then other similar app's. That killer sudoku can really give a headache thinking so hard!

One of the best sudoku apps out there, and it's free! It really should be more popular.