They exist on Raycast too, what are you missing?
Their entire calculator is crappy. It took them forever just to get scientific notation and inverse trig functions working.
Meanwhile, it was all proprietary (so I couldn't do anything myself) and they were busy developing AI. I know they have all the fancy add-ons and scripts, but at that point it is easier to just cmd+tab to the browser for Wolfram Alpha or commandline for numbat calculator.
I just realized Albert (sort of) work on MacOS, but it is in German for some reason, so I will have figure out configs.