RPN Calc
This RPN Calculator includes basic operations like (Add, Subtract, Multiply and Divide) in addition to showing a simple and beautiful history.
Category : Productivity
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Excellent simplicity. But the point of a dirt-simple calculator is to get in quick, do a cal quick, and get out quick, and the too-small + - x and รท buttons slow down the super-quickness that could have been (and that some of us want). And the true deal breaker? Every time you leave the app, the results (and history) clear out. So you can never enter a number, go to a different app, then back to this to sum another number, then to a different app, then back to this to sum another number (or anything like that). Every time you go back, it's zero'd again. Buh-buy.