Great Calc, especially for RPN
For those of us who prefer an RPN type calculator, this app has been the best. This app allows the user to see multiple stack levels which makes using it so much nicer. Very importantly, this calculator lets people have a choice of the old RPN or the updated RPL which it calls HP48 style RPN (RPL was an improvement over basic RPN when using visible multi stack levels). The customization is excellent so you have the functions you specially want readily available.
Also, thank you for listening and implementing customers comments (my request was the choice of a visible error notice instead of the vibrate). Listening to customers is what has propelled this app to be the top general calc app available (especially with so many free calc apps and the Apple supplied one).
The emusifyer about
PCalc, v3.6.1