PCalc: A 20-Year Journey of a Calculator App

PCalc, a seemingly simple calculator app, boasts a remarkable 20-year history. It began as a university project, initially designed as a central heating control panel! The author then transformed it into a programmer's calculator, releasing it as freeware in 1992. Through numerous iterations and platform ports, PCalc now graces iOS, Mac, and Apple Watch, incorporating innovative features. The story behind it is filled with passion for technology, connections with Apple, and a tribute to the late science fiction author Douglas Adams.