Since others already mentioned many fantastic alternatives, let me share mine: https://bbodi.github.io/notecalc3/
P.S. looks like a great app!
But providing a standalone desktop/terminal version is on the list.
As I see it it is rust and wasm. It would be nice to have some note about the architecture in the docs, maybe someone would pick it up to make a desktop app from it too.
However, in the next release I might provide a desktop version.
Just using an app that I can open and close anytime is much preferable to me. Currently using speedcrunch for this, but your solution looks a bit more feature full and maybe a good middle-ground between a calculator and just firing up ipython or similar.
All in all a desktop version would be much appreciated, but I understand if it's not a focus for you. For the technical part: what do you think, what would you use in rust to turn this intu a regular gui app?