iPhone: Japanese Soroban for iPhone

I have a few codes for the latest update of my Japanese Soroban for iPhone. If you know how to use an abacus or want to learn, it works great. There are no instructions in the app currently but they can be found all over the web. IM me for codes.

I'm actually kind of intrigued about how these work. I remember reading about children in Asia using them instead of calculators at school and as a result being much better (and faster) at mental arithmetic than the average western kid.

PM sent!