R47 RPN Calculator & Explorer
In-app purchases
Everyone
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50+
Downloads
About this app
A Reverse Polish Notation calculator isn't just a tool for getting answers like a traditional exam calculator—it's a way of thinking. It mirrors how you naturally break problems into steps, making it more like an extension of your mind than a shortcut.
A full HP-style scientific calculator — with no ads or tracking.
47 Calculator is a programmable Reverse Polish Notation scientific calculator. Trigonometry, logarithms, statistics, probability, finance, complex numbers, base conversions, matrix operations, numerical solvers — the full 47-series instruction set, in your pocket.
Free includes the calculator, a program editor for reading and writing 47-series programs, reference documentation, and a full tutorial library — probability and statistics, finance, numerical methods, programming patterns, advanced Reverse Polish Notation techniques.
The Pro version adds the Explorer — browse every menu, flag, mode, and operation the engine supports, searchable and cross-linked.
Works fully offline after first launch. Light and dark themes. No ads, no third-party analytics, no tracking, no account required.
A full HP-style scientific calculator — with no ads or tracking.
47 Calculator is a programmable Reverse Polish Notation scientific calculator. Trigonometry, logarithms, statistics, probability, finance, complex numbers, base conversions, matrix operations, numerical solvers — the full 47-series instruction set, in your pocket.
Free includes the calculator, a program editor for reading and writing 47-series programs, reference documentation, and a full tutorial library — probability and statistics, finance, numerical methods, programming patterns, advanced Reverse Polish Notation techniques.
The Pro version adds the Explorer — browse every menu, flag, mode, and operation the engine supports, searchable and cross-linked.
Works fully offline after first launch. Light and dark themes. No ads, no third-party analytics, no tracking, no account required.
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No data collected
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What’s new
-Chromebook Save File Dialog updates
-Bug fixes
-Bug fixes
App support
About the developer
MARCEL DAN
marceldan@dansbeesllc.com
231 Putters Green Ln
Maryville, TN 37801-1587
United States
