Numbercus was originally envisioned as a tool to assist some people on the autistic spectrum in learning fundamental aspect of numbers.Numbercus aims to help with learning the following- alternate representation of numbers helpful in some forms of mental arithmetic.- common western representation of numbers- representation of zero- positive integer numbers from one to a billion minus one- visual representation of scale between units, tens and hundreds- negation of leading edge zeros- pattern in placement of commasNumbercus App has been tested on an iPad 3.Numbercus App was created with Codea.