True fun fact: the author, Marcel Duin, got married yesterday!

The source is on github: https://github.com/Q42/0hn0

Yes we tried to fix most of the things that people didn't like. What do you think of it now?

At work so I haven't tried it out yet, I'll give it a go tonight. Thanks!

Should it ask before it does that?

Maybe, yes. You still have to think about which rule you violated / why your logic was wrong, though.

The concept is based on the Japanese "Takuzu".

Yup. https://github.com/Q42/0hh1

0h h1 is now available on Github. Clone away :)

https://github.com/Q42/0hh1

Hi, I'm Martin, the author. Thanks for analyzing the game and the recommendations. I was actually working on your solution a already. So it will be coming up shortly. Also, for those who were suggesting to put it on iTunes and the Play Store, it already is. Enjoy playing! - @mrtnkl

You should put a link to the app in the app stores on the website.

Thanks for not requiring my home address and current blood-sugar levels to install the android app!

I have nothing much to contribute, but I want to say that this is really well done, I'm having a lot of fun with it, and thanks for making an iOS app for it. Now I just need to train my brain to notice rows determined by the "identical row" rule....

I updated the question and gave a bit more reasoning to why it's ridiculous that we aren't able to properly tell the difference between an iPad Mini and an iPad 2.

Short version: It's not just about size. It's about weight and form factor. The iPad mini can and will be used differently, like being held with one hand. Designers/ developers such as myself should be able to provide users with a different default controlscheme for the Mini that could make advantage of this situation (such as using tap to walk instead of a virtual thumbstick - but that's just an arbitrary example).

+1 on creativity :)