This app was removed from the App Store.
PCalc - The Best Calculator
iOS Universal Utilities
PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody looking for a feature rich calculator. It includes an optional RPN mode and multi-line display, a choice of button layouts, an extensive set of unit conversions and constants, a paper tape, multiple undo and redo, engineering and scientific notation, as well as support for hexadecimal, octal, and binary calculations.
[NOTE: If you're having a problem installing via iTunes, try downloading directly via the App Store app on your device. And send me an email - thanks!]
Added support for the Apple Watch - now you can use PCalc without taking your phone out your pocket! Includes a full calculator app, a tip calculator, and a glance to see the result of your most recent calculations.
Added a warning message to avoid accidental layout editing.
148Apps —PCalc RPN Calculator