I have used Numi for several years - and versus Alfred/Google variants i have found Numi to be incredibly helpful for most back of the hand calculations. I hav

I have used Numi for several years - and versus Alfred/Google variants i have found Numi to be incredibly helpful for most back of the hand calculations. I have yet to find an alternative that is more convenient 1) Configurable keyboard shortcut to bring this up 2) Good units/percentages/bytes support 3) Variable assignments / custom functions 4) Long History