I think this is the best thing I've downloaded, ever. It never gets old, because there are infinite puzzles (as far as I know? I've played at least 800 since I got the app about 18 months ago). Don't think the difficulty ratings scale perfectly, but that does mean the game makes you keep learning.
My favorite time waster I have played this game constantly since I found it soon after its release. The developer made some significant UI changes but then was receptive to our requests to make the old interface available as an option. It's now back to its position at the top of my favorites list.
Don't download the update! I'm so bummed, this was my favorite game and the app was awesome! Unfortunately, I just downloaded the updated version and not only can I not change the screen orientation, but I can't play at all--the number pad isn't there. Super sad, I shouldn't have tried to update. I even uninstalled and reinstalled as someone recommended with no luck.
One of the Best Ken Ken Apps I play all the time on this app. Puzzles range from 4 x 4 to 9 x 9. There are an unlimited number of puzzles that can be created. One problem is that all puzzles required all four math operations. Other apps have the option of choosing which operations to use, but those apps cost more.
Used to love this game The new swipe interface is absolutely dreadful. I used to play dozens of times a day and now am uninstalling. Too bad you ruined the only game I had installed on my phone
Well Done! Well thought out with all the game-in-progress options that one could ask for. Thanks for this little gem! [Added] The latest v2.12 update fixed the Back key FC problem. Thanks!
*** v2.12 updates ***
Maintenance fix for back button crash.
*** v2.11 updates ***
Layout improvements across all devices.
Back button behaviour fix.
Entry mode bug fix.
For a full list of changes see: https://code.google.com/p/mathdoku/wiki/RevisionHistory.