i41CX+

Advanced programmable and expandable RPN scientific calculator with virtual thermal printer/plotter suitable for a wide variety of scientific, engineering, mathematical, financial, and technical applications.

Calculator Features

  • Functionally equivalent to the world-renowned HP-41CX
  • RPN logic with 4 element stack
  • Powerful rich set of numeric and mathematical functions
  • 319 main memory registers for storing data, programs, alarms, and user-defined key assignments
  • 600 extended memory registers for storage of data, text, and program files
  • Time, calendar, alarm, and stopwatch functions
  • Built-in module provides access to iPhone/iPod touch features such as location services, accelerometer, crypographically secure random numbers, mailing registers and flags, downloading data files, etc.
  • 12 character display with alphanumeric capability
  • User definable keyboard with support for overlays
  • Expandability: four module ports provide access to additional functions (e.g. matrix operations, programmer functions, equation solvers, etc.) beyond the standard built-in functions
  • Ability to download modules, user programs, register data, flag states, text files, and keyboard overlays from the internet
  • Ability to send and receive programs, register data, flag states, HEPAX RAM files, state save files, configuration files, and text files via email
  • Program features: automatic line numbering, labels, branching, subroutines, interactive alphanumeric input/output, loop operations, indirect addressing, flag operations, and synthetic operations
  • Sound support including synthetic tones
  • Ability to load, save, and email user programs, register data, and flag states
  • Ability to load and save calculator states and configurations
  • User adjustable calculator speed, calculator sounds volume, and display contrast
  • Optional interface sounds
  • Optional mini stack display
  • Support for calculator skins
  • Option to use the iPhone keyboard for alphanumeric input, including in the built-in alphanumeric text editor
  • Calculator and printer states are retained across program launches
  • Automatic synchronization of calculator's clock to the iPhone clock
  • Beautiful and clean user interface optimized for the iPhone and iPod touch portrait mode screen aspect ratio and to maximize the keypad area while still providing for a full featured scientific keypad

Printer Features

  • Color printing, plotting, graphics, and special characters
  • Ability to control print color on a per line basis either via GUI color sliders or programmatically via the calculator's highest numbered data register
  • The state of the printer/plotter is retained across program launches
  • Ability to save a JPEG snapshot of the virtual paper roll to the iPhone's photo gallery. These snapshots can then be emailed or transferred to the computer and printed out.