The first app that lets you type in an implicit curve and get a graph of its level set is a very different claim from "For all the history of computational mathematical visualization, graphing equations has been done in binary mode".

The millions of brightly-colored fractal posters adorning walls in the 80s are a very clear counter-example to your claim.

Your app is cool and the visualization is neat. The hyperbolic claims of originality really detract from that.

To be fair, yes, there are some places where non-binary graphing has been done (like error gradient graphs in AI), but as far as I know, this is the first app where you can type in a basic x/y equation and get a non-binary graph.