This simulation is designed to help visualize the symmetry about O and 90 degrees line of letters of the english language for primary mathematics.
Interesting Fact
This app is available on iOS and on the Support URL web.
Acknowledgement
My sincere gratitude for the tireless contributions of Francisco Esquembre, Fu-Kwun Hwang, Wolfgang Christian, Félix Jesús Garcia Clemente, Anne Cox, Andrew Duffy, Todd Timberlake and many more in the Open Source Physics community.