[suranyami]

This is remarkably similar to Calca.app, which I still use occasionally. http://calca.io/

I love that yours is web based! Can see it being much more reusable in a number of use-cases.

Calca was originally MacOS/iOS, but has since been ported to Windows.

I think that the notation in Calca to use a `=>` to display results maybe adds a bit more clarity to the math expressions, but your display style seems to work pretty well too.

The only advantage Calca seems to have is they’ve had almost a decade to add things like extra functions (compound interest, trig, …), constants, operators, etc.

I’ve always thought that style of simple but highly visible calculation is a far superior alternative to spreadsheets. Jupyter, LiveBook, Mathematica, etc… have shown that it works, but the world is still enamored with Excel, despite its propensity to hide mistakes.