RPN-32 CE is a photo-realistic simulation of Hewlett-Packard's third-generation scientific calculator HP-32E.

Released in July 1978, the HP-32E was the mid-range scientific member of the so-called "Spice" series. It was discontinued in 1983.

RPN-32 CE is a massively enhanced, yet fully compatible version of the HP-32E. Unlike the original, it's also programmable.


Features

• Easier to use than the original calculator


• Programmable (99 steps)


• Photo-realistic look-and-feel


• Full compatibility with HP-32E


• "Continuous" memory


• More registers than the original calculator (20 vs. 15)


• Unrestricted STO and RCL register arithmetic
  (incuding "double register" ∑+ and LSTx)


• Indirect register addressing


• Key-click and key-glow, both optional


• Swipe left across display to correct wrong number entries


• Cut/copy/paste display values and program steps


• Display stack registers and all memory registers (tap display once)


• Display and annotate programs


• Print program listing and description, or mail them as PDF documents


• Program looping


• Save, Print, Share programs


• Battery indicator lights up when battery charge drops below 10%


• Self-check: press STO ENTER. Tap any key to clear the display.


• Compatible with HP-25 programs


• Imports and runs programs created on the HP-25 simulator GO-25

• Decimal Point: select how the decimal should be represented. Also defines the look of the 1000's separator.


• Top Bar: Keys used for creating and running programs, as well as extra functions. Tap Operations for details.
  Shows the stack after swiping the display right. Swipe the display left, or tap the stack, to hide it again.


• Show Key Fronts: if enabled, tapping the g prefix key will reveal the hard-to-read functions printed on the key fronts.


• Key Glow Effect: if enabled, tapped keys are shortly highlighted. Useful if sound is off.


• Haptics: set the desired level of haptic feedback on pressing any key.


• Show Prefix Indicators: if enabled, prefix keys like f, g, STO will be marked with a white outline as long as they are active. A prefix key may be tapped again to deactivate it.


• f ENTER in RUN Mode: determines the behavior of the f-shifted ENTER key as follows:
  If Off: sets step to 00 in RUN mode; clears program in PROG mode
  If On: sets step to 00 on leaving PROG mode; enables/disables STi,RCi commands in PROG mode

• • Increased pause length to 2 seconds.
• • Added warning when attempting to replace a Sample Program.
• • Visual adjustments to iPhone 16 Pro and Pro Max.

• • Internal optimizations and cleanups
    New sample programs are now automatically loaded when opening the list of programs.
    Changed the default font for program listings from Courier New to Menlo.


• • Modified the info screen to avoid clipping by the Dynamic Island.


• • Added a line ("TOP") to the sample program on the info screen.

• New:
• • Runs on Apple Silicon Macs (Notes)

• New:
• • Set the haptics feedback level in the Settings

• New:
• • Change the program listing font with a simple tap on the button F
• • Sample Programs may be hidden in the list of programs
• • Apply a filter to quickly find any program

• New:
• • Sample program "TVM - Time Value of Money"
  (Run financial calculations involving payments, interest rate, present and future values, and periods or number of payments.)

• New:
• • When executed interactively, ISG and DSE do not change the program counter.

• Bug Fixes:
• • Deleting a block of program steps could result in wrongly adjusted branch targets in some cases
• • ISG/DSE commands were susceptible to internal rounding effects
• • RCi did not lift the stack when executed by a program

• New:
• • Print (or mail as PDF) the program or its description.
• • A program running longer than 1 minute will emit a sound when finished (by GTO 00).
• • 12- or 24-hr clock (by tapping f or g, followed by P/R)
• • Improved accuracy in extreme cases of y^x with positive, integer x.
• • Call up "What's New" anytime from Info screen

• Bug Fixes:
• • Display issues when operating the iPhone in "Zoomed" mode
• • RND didn't work correctly in regions using comma as decimal point
• • Double- or triple-tapping the empty program listing area caused a crash

• New:
• • NOP instruction shows as LBL if targeted by GTO or GSB
• • Improved import of HP-25 programs created by the GO-25 simulator.
• • Haptic feedback may be turned off and on:
    – Store 1939010X in R0 to set amount of feedback
      (where X = 0: no feedback, X = 3: maximum feedback)
      Storing other values in R0 doesn't change the setting.

• Bug Fixes:
• • Deleting a range of steps (DLx,y) did not always correctly adjust targets of GTO/GSB
• • The instruction RND, as imported from GO-25, was named incorrectly

• New:
• • Register view shows localized formatted value while number is being entered

• Bug Fix:
• • Using scientific notation could crash the app in some regions, i.e. Australia, Sweden, Slovenia

• New:
• • Support for iOS 13: Dark Mode, file sharing
• • Email programs directly from the program list
• • Replacing registers by pasting a program into the display is now optional
• • Many under-the-hood optimizations
• • iOS 11 or later

• Bug Fixes:
• • The keys GTO, STO, and RCL didn't cancel a pending flag command
• • Executing the summation command ∑ with a very large argument would cause a crash

• New:
• • New editing commands in programming mode:
    – DELx,y (= f DEL) deletes range of program steps
    – DELEnd (= g DEL) deletes all steps from current position to end of program

• Bug Fix:
• • The instruction GSB 90 could not be entered

• New:
• • Long-press program listing to change font of description from proportional to non-proportional and vice versa.
• • New program "Curve Fitting" added.

• Bug Fix:
• • Crash on double-tapping GTO nn in program listing when step nn didn't exist

• New:
• • Register R.9 is now formatted in Register View for easy interpreting in ISG/DSE commands

• Bug Fix:
• • Commands STi and RCi had mixed key codes in PRGM mode

• New:
• • Optional stack display (swipe display right/left)
• • Indirect addressing of all 20 registers via the R.9 register (on f and g keys)
• • Set flags are shown as highlighted register number in Register View
• • Flags are saved and loaded along with programs
• • Warning dialog on deleting program memory or program files
• • On-screen error descriptions
• • Improved reliability of comparisons
• • New programs: Gamma Function (Spouge), Incomplete Gamma

• New:
• • New sample programs:
    – Simult. Equations in 2 Unknowns
  – Fibonacci Numbers
• • Improved Program Listing (tap "?" in listing screen)
• • New buttons at top to select TOP, MID or END of program
• • Built-in descriptions of top functions (see Settings)
• • Except on step 00, pressing R/S shows next command to be executed; releasing R/S starts executing
• • Renamed button "Load" to "Save"
• • Changed "Undo digit" sound to same as with other CuVee calculators
• • Support for late 2018 iPhones

• Bug Fixes:
• • Improved reliability of DSE and ISG commands
• • Digit separators were not cleared when starting number entry with EEX

• New:
• • Improved compatibility with iPhone X

• Bug Fixes:
• • Incorrect app icon shown when installed on iPad
• • Number format issues and possible crash when using the EEX key

• New:
• • New sample program:
    – Progressions (arithmetic, geometric, harmonic)
• • Improved trig functions for extremely small angles
• • Support for iOS 11 and iPhone X

• Bug Fixes:
• • Separators didn't always disappear when changing display mode to SCI or ENG
• • Copied display values with exponent could be improperly formatted

• New:
• • New sample programs:
    – First Order Differential Equations
    – GCD and LCM (Greatest Common Divisor and Least Common Multiple)
    – Rectangular / Hyperbolic Polar Coordinates Conversion
    – Rectangular / Spherical Coordinates Conversion
    – Sum of Digits Game
  

• Bug Fixes:
• • RND didn't work correctly on certain values
• • Deleting steps caused wrong address corrections in some cases

• New:
• • New commands:
    Real subroutines with 4 levels of nesting
    Loop control
    10 flags
  

• New:
• • New commands:
    ABS (Absolute value of x)
    NOP (No Operation)
    RAND (Random number)
    CSTK (Clear stack)
  
• • Full complement of compare operations (12 in total)
• • Improved FRAC function
• • Pause length changed from 2 secs to 1 sec
• • Import and run programs created on the HP-25 simulator GO-25

• Bug Fix:
• • Pasting a GTO command into the display could crash RPN-32
• • RND didn't round correctly certain values in SCI and ENG mode

• New:
• • Calculator sounds mix with background audio and have their own volume control
• • Now with 30 sample programs included

• New:
• • Pause activity is shown in main and register view
• • Improved results for SIN, COS, TAN with very large arguments
• • Decimal addition/subtraction for higher precision

• New:
• • Added comparisons with zero (tap and drag finger into keyboard area before releasing)
• • Register view gets updated while a program is running
• • Run/stop and single-step program without leaving register view
• • Added copy of actual display to register view
• • LastX may be used in register arithmetic operations, e.g. RCL + yˣ
• • Tapping any key stops program execution
• • SST and BST may be cancelled by dragging finger off key
• • Shared programs include calculator settings and registers
• • Improved handling of values pasted as text
• • Improved address correction when deleting program steps
• • Support for uncommon number groupings (e.g. India)
• • Added copy of R/S key in bottom-right corner for easy access even when programming keys are turned off

• Bug Fixes:
• • Fixed x < y and x > y comparison functions involving very large numbers
• • Fixed automatic target correction of GTO command at end of program memory
• • Fixed rounding in SCI mode
• • Entering too many digits was not properly handled

• New:
• • Registers, display format and angular mode are saved with programs
• • Program loading sets display format and angular mode
• • Registers may be preset by pasting multi-line text into the display
• • Current program step is shown below display. Tap to show or hide.
• • In program mode, progress bar shows fill status of program memory
• • User programs are listed separatedly from sample programs

• Bug Fixes:
• • Automatic stack-lift was not re-enabled in certain situations
• • Large arguments of tanh(x) could cause a crash
• • GTO 83 was not programmable

• First public version.

RPN-32 CE

The Spice Pac