Some good, some not so good

Love that it can float above other windows, and has all the basic calculator functions you’ll need (and that are no longer in the calculator that comes with OS X).

Not so good: the buttons are bizarrely rectangular instead of square, so on my Retina Mac they are hard to hit. Would like to see options to change colour scheme and size of calculator.

WeeklyWebster about Always on Top Calculator, v4.8.6