This app is not updated yet
As of this writing, this app has not been updated yet using the current uCalc engine. uCalc Console Calculator has not been updated in over 10 years. Though you might get some use out of it as-is, it does not match the current documentation.
Content for this product can be found on the old website at old.ucalc.com/console-calculator.html
Console Calculator
A lightweight command-line calculator. Perfect for power users.