4.8
133 reviews
50K+
Downloads
Content rating
Everyone
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About this app

Programmer's calculator that simulates an HP 16C. It simulates the appearance and behavior of the original, including the seven-segment display, and the little blink you get when entering numbers. The 16C's windowing functions are implemented, but can be disabled to allow the display of longer numbers at one time.

Full source is available on Github. There is no advertising of any kind -- this is a hobby project, and a bit of a labor of love.

Do be aware that the 16C is a calculator intended for computer programmers. If you're not familiar with hexadecimal or stack-based RPN calculators, this probably isn't what you're looking for!
Updated on
Jun 17, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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Ratings and reviews

4.7
121 reviews
Myles Trumbore
November 28, 2021
Reviewed moments after download. I have one of these for real bit the screen died unfortunately. This works just as well with the asthetic I like. The cherry on top is the inclusion of the back panel. Absolutely perfect. Thank you for keeping this tech history alive and making a very functional app.
10 people found this review helpful
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Joel Monterrey
December 8, 2023
OMG! This is exactly like the old HP calculators! It functions and looks like the originals except of course that it's fast. It also functions extremely well just as an Android calculator. It's really a good app. Excellent look and feel.
3 people found this review helpful
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Sam Schafer
December 18, 2022
Beautifully executed calculator. It looks and works great! Thank you very much for sharing your work and helping to keep RPN alive and well. (Thanks to Emmett, too, for letting you use his code.)
6 people found this review helpful
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What’s new

* Allow choice between Android haptic or vibrate API: Issue 102

App support

About the developer
William Frederick Foote
billf@jovial.com
United States
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