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Apps with 'Reverse Polish notation (RPN)' feature

  1. SpeedCrunch is a free, fast, high precision open source algebraic calculator with an intuitive interface and many features, such as variables, syntax highlighting, functions, persistent input history & more.
    • Mac
    • iPhone
    • iPad
    • Apple Watch
    • Apple TV
    More
    PCalc is the powerful choice for scientists, engineers, students, programmers, or indeed anybody looking for a feature rich calculator.


  2. XCALC is my little RPN calculator completely free to use, and still downloadable. XCALC is now a DEAD project. No work has been done on this project since 2012, and nothing more will be done either.

    Discontinued

    XCALC is now a DEAD project per homepage, but it is still downloadable.

    • FreeOpen Source
    • Mac
    • Windows
    • Linux
    • Android
    More
    EBTCalc is a Reverse Polish Notation (RPN) calculator that can have custom buttons. Custom buttons are programmed in Javascript with a convenient editor. EBTCalc runs on Windows 10, OSX, and Linux as well as Android. EBTCalc is open source.
  3. galculator is a GTK 2 / GTK 3 based calculator with ordinary notation/reverse Polish notation (RPN), a formula entry mode, different number bases (DEC, HEX, OCT, BIN) and different units of angular measure (DEG, RAD, GRAD).

    Discontinued

    Reported as no longer to be updated/developed by the developer : https://github.com/galculator/galculator/issues/37
    So far no forks have appeared.

  4. Excalibur for Windows 32-bit version is a freeware full featured RPN-only calculator. This is a serious calculator for serious users. Excalibur takes up a small amount of resources for all it does so well.