RPN-67 NP3.0 - App Store

RPN-67 NP is the non-programmable version of RPN-67 Pro, the first complete simulation of Hewlett-Packard's HP-67 legendary programmable calculator for iOS. Produced from 1976 to 1982, the HP-67's capability to store programs on magnetic cards, wide array of functions, merged keycodes, indirect addressing and other enhancements made it a huge success among scientists, engineers and other professionals. Thousands of programs were written for it.

RPN-67 NP allows you to load and run 25 original HP sample program cards. It lacks the program creation and card management features of the Pro version, as well as its massively expanded array of functions and operations. Apart from these restrictions, RPN-67 NP is a very capable vintage scientific calculator.

Features:

. "Live" display of stack, memory registers, program counter, flags
. Virtual paper tape printer
. E-mail or print the paper tape
. Cut/copy/paste display value
. 30 selectable background images, even add your own.

More features the HP-67 never offered:

. Non-volatile memory - stack, registers, program
. Status indicators for prefix keys (f, g, h, STO, RCL, GTO, DSP)
. Keycode-to-command translation while single-stepping a program
. Cancel SST or BST operation by sliding your finger off the depressed key

All advanced features may switched off with a single setting, allowing you to experience a real HP-67 as closely as possible.

For more information visit the RPN-67 website: cuveesoft.ch/rpn67

Version History • Added 20 original HP program cards, for a total of 25 cards. They are marked "NP" on the website.

• Improved paper tape printer with animated paper roll.

• Some fonts changed from Courier to Menlo for better legibility.

• Requires iOS 12.0 or later. 3.0 03/08/2024 • Name change of the app

• Access RPN-67 homepage directly from the info screen

• In vintage mode, loading a card produces the sound of a real HP-67's motor

• Fixed: app freezing after setting mode switch to position W/PRGM 2.7 01/14/2019 This update requires iOS 8 or later.

• Print preview in iOS 9 and higher
• Calculator sounds mix with background audio and have their own volume control 2.6 09/28/2016 • If audio is playing on start-up, RPN-67 Free will not produce any sounds 2.5 09/02/2015 • Corrected program card "Circle Computations" not properly setting up calculator
• Cosmetic changes, speed improvements 2.4 04/08/2015 • Now with 5 original HP sample programs

• Source code of included programs may be printed on paper tape

• Nicer looking printouts on external printers (AirPrint)

• Improved sound volume control

• 64-bit support
Bug Fix:
• Calculator didn't turn itself on automatically (iOS 8 only) 2.3 02/15/2015 • Rounding in SCI and ENG notation now works correctly
• Fixed FRAC function for some rare cases 2.2 08/23/2014 • Now with 30 backgrounds to choose from, PLUS import your own background image
• Improved y^x function, e.g. (-9)^4 will not produce complex result anymore
• On PAUSE, tapping and holding a key now prolongs pause

Remember: Leaving a nice review on the App Store not only makes the developer feel good, it also helps other people assess RPN-67 Free. 2.1 03/28/2014 • Now with three sample program cards
• Key fronts revealed as long as the h key is active
• Full-screen display
• iOS 7 compatibility 2.0 09/18/2013 • Improved preview of background patterns in settings dialog

Bug fixes:
• Fixed pasting values dropping decimal point in certain regions
• Fixed a situation where the stack would not auto-lift 1.2 06/06/2013 • Touch a button to reveal fronts of hard-to-read keys
• Slowed down REG, -x-, STK commands when printer is not visible

Bug fixes:
• Fixed register I showing only very quickly in REG command
• F3 is set on beginning number entry with EEX
• R/S finishes input mode
• Register arithmetic now underflows correctly to zero 1.1 04/30/2013 1.0 02/28/2013