Great classic calculator

¥300Best Deal Ever
3.6.1for iPhone, iPod touch
6 Ratings
CuVee Software
Update Date
Age Rating
Age Rating
Apps in this category do not contain restricted content.
Apps in this category may contain mild or occasional cartoon, fantasy or real-life violence, as well as occasional or mild adult, sexually suggestive or horrifying content and may not be suitable for children under 9 years of age.
Apps in this category may contain occasional mild indecent language, frequent or intense cartoon or real-life violence, minor or occasional adult or sexually suggestive material, and simulated gambling, and may be for children under 12 years of age.
You must be at least 17 years old to access this App.
Apps in this category may contain frequent and intense offensive language; Frequent and intense cartoon, fantasy or realistic violence: frequent and intense adult, scary and sexually suggestive subjects: as well as sexual content, nudity, tobacco, alcohol and drugs, may not be suitable for children under 17 years of age.
RPN-38 CX スクリーンショット
RPN-38 CX ポスターRPN-38 CX ポスターRPN-38 CX ポスターRPN-38 CX ポスターRPN-38 CX ポスターRPN-38 CX ポスターRPN-38 CX ポスターRPN-38 CX ポスター

About RPN-38 CX

RPN-38 CX is the first photo-realistic simulation of Hewlett-Packard's popular high-end programmable business calculator HP-38C for the iPhone. Produced from 1979 through 1983, it was the "Chive" member of the third-generation HP calculators known as the "Spice" series.

While the simulator works like the original calculator, a number of carefully designed extensions make it a lot easier to use.

RPN-38 CX is fully compatible with the HP-12C, except for calculations and programs involving Bonds and Depreciation.


• Photo-realistic look-and-feel
• Programmable (99 steps, program memory not shared with register memory)
• Subroutines, flags, loop control, extended conditional branching
• Insert and delete steps with automatic address correction
• 20 registers, "continuous", with unlimited store/recall arithmetic
• Indirect register addressing
• Register view
• Program listing view
• Program library view
• Additional functions (nominal and effective interest rate)
• Shortcuts for often-used key combinations
• Store and retrieve any number of programs
• Sharing: e-mail, AirDrop, Dropbox, copy, paste, print
• 40 programs pre-installed

Calculator functions:
• Percentage (%, ∆%, %Total)
• Simple and Compound Interest
• Optional odd periods (like HP-12)
• Nominal/Effective interest rate conversion
• Amortization
• Discounted Cash Flow Analysis
• Net Present Value, Internal Rate of Return
• Date and Calendar (actual or 30/360 day basis)
• Statistics (mean, weighted mean, standard deviation)
• Linear Regression
• Additional functions not found on the HP-38:
- Subroutines, flags, loop control, random number, Pi, Log, x² and more

Details: cuveesoft.ch/rpn38
Show More

最新バージョン 3.6.1 の更新情報

Last updated on 2022年10月09日
• Fixes a crash when trying to Export a program
Show More
Version History
• Fixes a crash when trying to Export a program
• Haptics
Set the haptic feedback level in the calculator's settings.

„Sounds & Haptics“ / „System Haptics“ must be on in the iPhone's settings.

• KeyGlow
Enable or disable key flashing in the calculator's settings.

• Program list view can be dragged down to dismiss it.
• Change the program listing font with a simple tap on the new button "F"

• Apply a filter to quickly find any program.

• Sample Programs may be hidden in the list of programs.

Bug fix:

• IRR and NPV cash flow calculations produced incorrect results if the group count of the initial investment CF0 was larger than 1.
• Improved solving for interest handles extreme cases without iteration error

• Address LASTx indirectly via RCi and STi by treating it as register 20

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

• CLEAR FIN clears the Compound Interest indicator only when "Use Odd Periods" is off

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
• Print (or mail as PDF) the program or its description

• A program running longer than one minute will emit a short beep when executing the final GTO 00 command

• Tap f or g, then P/R to see a 12- or 24-hour clock.

• Improved accuracy in extreme cases of y^x with positive, integer x.
For example, 1.0000001^(2^27) = 674530.4707, not 674530.4760

• New or updated programs: "Trigonometrics", "Gamma Function (Spouge)"

• Call up "What's New" anytime from Info screen

• Compatibility with iPhone 12

Bug Fixes:

• Fixed display issues when using the iPhone in "Zoomed" mode

• The RND function didn't work correctly in regions using a comma as decimal point

• Double- or triple-tapping the empty program listing could cause a crash.

• Setting the haptic feedback level didn't check sufficiently for the correct code
• Replaced function π with NOP in top function bar

• π is now "g +"

• NOP instructions show as LBL if targeted by GTO or GSB

• Key flashing may be turned off and on:
- Store 19390101 in R1 to turn off
- Recall 19390101 from R1 to turn on
(Hewlett-Packard Company was founded on Jan 1, 1939)

• 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)
• 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.
• 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

Check out the new Download walk-through on the website (under "Sharing".)

Bug fix:

• Executing the summation command ∑ with a very large argument would cause a crash

RPN-38 CX now requires iOS 11 or later.
• New editing commands in programming mode:
– DELx,y: delete range of program steps
– DELEnd: delete steps from current position to end of program

• New program added: "Multiple Linear Regression"

• Updated program: "Solve f(x) = 0"

• Improved accuracy when solving for interest

Bug fixes:

• The instruction GSB 90 could not be entered

• In some situations, "Error 5" could only be cleared by executing CLR FIN
New features:

• You can now do register arithmetic using the ∑+ key, e.g. RCL + f ∑+ will add registers R2 and R4 to X and Y, respectively.

• Long-press program listing to change font of description from proportional to non-proportional and vice versa.

• More detailed descriptions and additional examples in the built-in sample programs. Be sure to execute "Reload Sample Programs".
• In addition to exchanging X with register I, you can now use STO I and RCL I with full register arithmetic to register I

• Fixed crash on double-tapping GTO nn in program listing when step nn didn't exist
• The I-register can now be observed in Register View, formatted for easy interpreting in ISG/DSE commands

Bug fixes:

• DSE command didn't skip on negative counter values

• Storing a value in a regular register, then pressing a financial key would not store the value but execute the function instead
• Optional stack display (swipe display right/left)

• Indirect addressing of all 20 registers via the I register (on f and g keys)

• Improved NOM/EFF operations now use number of periods currently stored in n

• Set flags are shown as highlighted register numbers in Register View

• Flags are now saved and loaded along with programs

• Warning on deleting program memory or program files

• On-screen error descriptions

• Improved reliability of comparisons

• New programs: LogFactorial, Interest/Discount Conversions

Bug fixes:

• Viewing a program containing any of the commands xw, s, or ∑- would crash the app

• Errors didn't always report the correct error number
• Improved Program Listing (tap "?" in listing screen)

• New buttons at top to select TOP, MID or END of program

• Built-in descriptions of extra functions (see Settings)

• Pressing R/S shows next command to be executed; releasing R/S starts running program

• Cancel R/S by dragging finger from the key

• Renamed button "Load" to "Save"

• Changed "Undo digit" sound to same as found on other CuVee calculators

• Support for late 2018 iPhones

Bug fixes:

• Layout issue when showing g-shifted keys
• Digit separators were not cleared when starting number entry with EEX
Bug fix:

• Result of DATE operation was not correctly displayed
• Improved compatibility with iPhone X

Bug fixes:

• Incorrect app icon shown when installed on iPad
• Number number format issues and possible crash when using the EEX key
• Top GTO button could not be toggled on and off
• Improved trig functions for extremely small angles

• Support for iOS 11

Bug fix:

• Separators didn't disappear when display auto-switched from FIX to SCI mode
• New sample program "Prime Factors" added

Bug fix:

• Examples "Odd Period Example" did not work as shown in description
• New program "Polar-Rectangular" (tap "Reload Sample Programs" to see it)

Bug fix:

• RAND was not programmable
• New program "Numerical Integration" (tap "Reload Sample Programs" to see it)

Bug fixes:

• Pi didn't auto-lift the stack
• RND didn't work correctly on certain values
• Deleting steps caused wrong address corrections in some cases
Enjoy a major new release:

• Real subroutines with GSB and RTN, 4 levels of nesting

• Loop control via I-register (DSE, ISG, x≷I)
- Store control value nnnnn.xxxyy in I, where
nnnnn = counter
xxx = limit to test
yy = increment/decrement value
DSE: decrement nnnnn by yy and skip step if nnnnn ≤ xxx
ISG: increment nnnnn by yy and skip step if nnnnn > xxx

• 10 flags F0…9
- F? n Test flag n
- SF n Set flag n
- CF n Clear flag n
F2 auto-clears on test
F3 auto-sets on numeric input, clears on test
CLEAR ALL clears all flags

• Now with 12 comparison commands

• New operations: x², LOG, π, RAND (random number)

• CLEAR ALL is now programmable

• Speed improvements

• Improved programs: "Curve Fitting" and "Easter Date"

Bug fix:

• Displaying a date, switching to program mode, then toggling the D.MY switch would force-quit the app
• Better FRAC results for large arguments
• Program added: "Easter Date"

Bug fix:

• RND is now ignored if SCI display format is active
Bug fix:

• The setting "Use Odd Periods" could not be saved
• Easter date for 1583 thru 4099: set y = 0, x = year, execute DATE
• New command "D.MY/BEGIN?" to read mode switch. Tap "f", then mode switch to program.
• Calculator sounds mix with background audio and have their own volume control

Bug fix:

• Fixed a possible crash on startup
• Pause activity is shown in main and register view
• Decimal addition/subtraction for higher precision

RPN-38 CX 価格



次のリストをチェックして、RPN-38 CXの最低システム要件をご確認ください。
iOS 11.0以降が必要です。
iPod touch
iOS 11.0以降が必要です。
RPN-38 CXは次の言語がサポートされています。 英語

RPN-38 CXの類似アプリ


CuVee Software からもっと手に入れる