Oops
Inverse Tangent in degrees is still broken.
Calculator nostalgia
Works great! My son loves it!
Tan -1 does not work
Inverse tangent doesn’t work in degrees
Response from developer
I fixed this bug, please try again!
$4.99
About
Relive the classic computing experience with a vintage scientific calculator. This app emulates a beloved 90s model, offering a nostalgic and functional tool for calculations.
✓Vintage scientific calculator emulation
✓Classic 90s design
✓Functional for scientific calculations
✓Nostalgic user experience
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What's New in HP15C
1.2
January 29, 2026
fixed bugs, added sound button
User reviews
Developer apps
FAQ
What is HP15C?
HP15C is a vintage scientific calculator app that emulates a classic 90s model. It offers a functional and nostalgic computing experience for users on iPhone and iPad.
How much does HP15C cost?
HP15C is a paid application, priced at $4.99. This one-time purchase grants you access to the full functionality of the classic scientific calculator.
Does HP15C have ads?
No, HP15C does not contain advertisements. As a paid application, it provides an uninterrupted user experience without any in-app ads.
What devices support HP15C?
HP15C is compatible with iPhone, iPad, and iPod devices. It is designed to run on Apple's mobile operating systems.
What is the age rating for HP15C?
HP15C has an age rating of 4+. This indicates that the app is suitable for users of all ages, with no mature content.
When was HP15C last updated?
The latest version of HP15C was released on January 29, 2026. The app is actively maintained by its developer, FERMAVE LLC.
What is the user sentiment for HP15C?
Based on the available data, HP15C has a rating of 2.7 stars from 3 ratings. This suggests a mixed user reception.
