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 for hexadecimal, octal, and binary calculations. Includes an Apple Watch app, so you can calculate on your wrist! 2v311d
Fixed a crash in the settings if you were using the 2013 app icons on iOS 17.
PCalc 
Dice by PCalc