RPN-25 CE is a photo-realistic simulation of the HP-25C scientific calculator by Hewlett-Packard, available for iPhone users. This app replicates the features of the original HP-25C released in July 1976, including its notable "Continuous Memory" improvement. With a visually authentic design, this calculator offers programmable capabilities with up to 999 steps, user-defined function keys, program auto-start option, and an extensive library of pre-installed programs.

The RPN-25 CE simulator not only mimics the functionality of the original HP-25C but also enhances it with over 270 additional functions, 100 built-in sounds, and features like live register and stack views. Users can enjoy a high-contrast display, support for Dark Mode, and seamless sharing options for their programs.