I like Soulver, but I've found Calca to be a better fit for my needs. It supports graphing, unbound functions, and more advanced math support. Its UI is more minimal and the rendering isn't as nice as Soulver, but I find I'm able to iterate with it a lot faster.

I'm trying out QuikTape now, but it had to clone 1.6GiB. When I launch on macOS I am not able to actually type into the UI, and the window doesn't show as an app in the dock. Perhaps it's more functional on Linux.

I'm still waiting for an app that can properly do real units/dimensional analysis and good date math (`today + 3 business days`).