Free42 is a re-implementation of the HP-42S calculator and the HP-82240 printer. It is a complete rewrite, not using any HP code, and it does not require an HP-42S ROM image. The executables and source code are released under the terms of the GNU General Public License, version 2.All third-party code used in Free42 is either in the public domain, or licensed under terms compatible with GPLv2, or used with the authors permission.

Free42 alternatives

Sci:Pro Calculator

Sci:Pro Calculator is a simple multi-mode calculator for your iPhone, iPad, and iPod Touch (Universal App). The app features three modes of operation: Basic, Scientific, and Programmer. Mode (Degrees, Radians) Exponent Functions (2^x, 10^x, x^y, x, x e^x) Root Functions (, , xy) Logarithmic Functions (Log2, Log10, Ln) Other Functions (random, Exponent, Factorial, 1/x) Numerical Constants (, e)Programmer Mode: 64 bit Integer Values Radix Modes & Conversion (Binary, Decimal, Hexadecimal, Octal) Integer Math Functions (+, -, , , MOD) Bitwise Operators (AND, OR, NOR, XOR) Bit Shift and Rotate (Single & Multiple bit) Signed Number Operations (1s & 2s Complement) Byte-Flip, Word-Flip Bit Count Random Integer Parentheses Keys (Expression Grouping/Nesting) Full-time Binary View (iPad Only) Encoding Views (ASCII, Unicode, RGB) Multiple Copy Formats (Binary, Hex, Decimal, ASCII, Unicode, RGB value) Multiple Paste Formats (Decimal, Hex, Octal, and Binary values)

  • rating 4.6875
  • size 51.8 MB

Retro 15C

Students and scientists from the 1980s will remember the classic RPN scientific calculators. These calculators strike a perfect balance between functionality and complexity. I love this calculator and I like to share.

  • rating 4.84
  • size 5.6 MB

42s RPN Calculator

42s is an iPhone port of Thomas Okkens excellent and stable Free42, a complete re-implementation of the highly praised HP-42S RPN calculator. There are no ROMs or emulators involved allowing 42s to run natively and fast. * Added display option to show flags 0-4 at the top of the display if they are set.

  • rating 4.125
  • size 1.9 MB

my41CX

my41CX is an advanced programmable and expandable RPN Calculator. It is a functionally equivalent to the world famouse HP-41C/CV/CX calculator. Calculator features:- Functionally equivalent to the HP-41C/CV/CX- Programmable- Four module ports provide access to HP-41 expansion pacs- 63319 Memory registers (depending on the model emulation)- 4412233 Program steps (depending on the model emulation)- Support for .MOD files- Beautiful and clean user interfaceNote:- Beep is not supported

  • rating 3.4
  • size 14.0 MB

Complex RPN Calculator

Complex RPN Calculator is a scientific RPN calculator with a four stack whose native number is complex. You can view and enter numbers in both polar and rectangular formats. Complex RPN remembers its state between usages and has 10 memory locations.

  • rating 3.66667
  • size 0.7 MB