About
This app faithfully recreates the legendary HP 16C Computer Scientist calculator, offering advanced hex arithmetic, bit manipulation, and base conversion. It features RPN, keystroke programming, and modern enhancements like a two-line display and haptic feedback.
What's New in HP16C
1.0.6
June 4, 2026
Fixed a crash when you overflowed the largest signed value at a 64-bit word size, for example, adding 1 to 2^63 The bad value got saved too, so the app would crash again on every launch until it was reinstalled. It now rolls over to the most negative number. Thanks to the user who reported it.
MoreFAQ
What is HP16C?
HP16C is a mobile application that provides a faithful recreation of the legendary HP 16C Computer Scientist calculator. It offers advanced features for hexadecimal arithmetic, bit manipulation, and base conversion, designed for programmers and engineers.
Does HP16C support RPN?
Yes, HP16C fully supports Reverse Polish Notation (RPN), which is a hallmark of the original HP 16C calculator. This means it does not use an equals key and expects users to be familiar with RPN input methods.
What programming features does HP16C offer?
HP16C includes keystroke programming with support for labels, subroutines, loops, and conditionals. It also features storage registers with direct and indirect addressing, allowing for complex program creation.
How does HP16C enhance the original HP 16C?
HP16C offers several modern upgrades over the original, including a two-line display to see both X and Y registers simultaneously, a wider LCD that displays all 32 bits in binary without scrolling, and haptic feedback on key presses.
Is HP16C suitable for beginners?
HP16C is designed for users familiar with advanced calculator functions like Reverse Polish Notation and two's complement arithmetic. It is not intended for users seeking a simple, everyday calculator.
What platforms is HP16C available on?
HP16C is available for iPhone and iPad devices, indicated by its support for 'iphone' and 'ipad'.
How often is HP16C updated?
The latest version of HP16C, 1.0.6, was released on June 4, 2026. This suggests a relatively recent update, though the frequency of future updates is not specified.
Does HP16C have ads?
No, HP16C does not contain advertisements. The application is free and does not include any in-app purchases, making it an ad-free experience.