I do not make so many calculations nowadays. When a computer is on, I have a xonsh and all the calculation power of Python. When not, the simple calculator app

I do not make so many calculations nowadays. When a computer is on, I have a xonsh and all the calculation power of Python. When not, the simple calculator app that came with the cellphone is most of the time sufficient. But I think when doing lots of or at least frequently scientific calculations, a good physical calculator has superior characteristics. Typing a 'sin'-Button is way faster than typing 's' 'i' 'n' on a keyboard, e.g.