A very practical re-think
I really like the novel approach to adapting a calculator to the watch display and interface. Anyone used to using a calculator will find it intuitive, but it adds the possibility to scroll through the expression using the crown, and change numbers and operators at will. This makes it hugely more useful. Update: the more I use this, the more impressed I am. I have tried several calculators on the Apple Watch, and this stands out very much as the best I am aware of, for everyday calculations. So much so that I have been using it in preference to my phone or a calculator. It's actually fun to use; an odd thing to say, I know! Version 1.2 adds the ability to hold on a number to toggle high precision on and off. A small grey indicator shows which numbers have been rounded. You can repeat the ‘welcome’ introduction by entering 00 after clearing the display. Super useful.
