y = x app for iPhone and iPad

This app is for both who hates math and who loves math.

The concept is that users "feel" numbers by your calculation about length of number line , x-y field and a side of right triangles several times repeatedly with different numbers. A book or human cant offer the different repeat on a question which can give us chances to see the core of math, number nature. This math app is not only on the screen but in your thoughts. Math calculations sometimes seems to be meaningless, but in this app, the actual length on the screen supports your thought to find the answers. Then you would find the power of calculation rather than an estimation of length and vise versa. An estimation is also powerful. Furthermore, the programmed questions provide you a lot of occasions to learn equations, functions and geometry.

This app has two main modes: Game and Practice.

Game mode has five stages.
Stage1
Basic four operations and fractions with length of number line.

Stage2
Coordinate and linear functions.

Stage3
Simultaneous equations with graph.

Stage4
Linear and Quadratic functions with root.

Stage5
Calculation of root squares and Pythagorean theorem with time restriction.

Practice mode
1. Simultaneous Equations.
2. Root practices with four sections.
3. Proof of Pythagorean theorem.

Math has its 3000 years history. Physics was born from Math, which means chemistry and biology are also related with math. The beauty of math related with art would be its accuracy with complexity.
I hope that you would see and find your new math world through this app. Thoughts in math are not only in math but also useful in life. To see the world from different "angle" is precious for us to have options. A hate emotion prevents us from seeing it correctly. Even if you hate math, I also hope that you would overcome the emotion by pleasure of finding answers with effort.