Forth Calculator

500+
Downloads
Content rating
Everyone
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About this app

A Free, RPN (Reverse polish notation) calculator with programmable buttons and many builtin functions. It is equipped with two stacks, a main and an auxiliary. You can freely move data between them by swiping left or right. The stack operators are from the FORTH programming language, in fact the whole calculator logic is implemented in a custom FORTH.
The pro version gives you full programming capabilities where you can write your own operators.
Updated on
Sep 2, 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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What’s new

Fix UI system bar overlap

App support

About the developer
Attila Magyar
m.magyar3@gmail.com
Budapest Egressy út 27 1149 Hungary
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