Comparison

WP 34s vs RPN

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

WP 34s

This app is a powerful RPN scientific calculator with extensive functions for mathematics, statistics, programming, and engineering. It includes programmer functions, fraction mode, probability distributions, and a stopwatch, offering a comprehensive tool for complex calculations.

Highlights
  • RPN scientific calculator implementation
  • Programmer functions (binary, octal, hexadecimal)
  • Fraction mode and probability distributions
  • Stopwatch with real-time clock
  • Mathematical, statistical, and financial functions
  • Unit conversions and physical constants
  • Extended character sets for multiple languages
Features
Read full description

WP 34s is the most powerful and complete implementation of a classic RPN scientific calculator. Now available on iOS too (see the support site for other emulators and for the real stuff). The function set of the WP 34S is based on the most powerful programmable RPN calculators built so far and we expanded the set, incorporating programmer functions (base 2, 8 & 16), a fraction mode, probability distributions, a stopwatch... We also included numerous additional useful functions for mathematics, statistics, physics, engineering, programming, I/O, etc., such as: + Euler’s Beta and Riemann’s Zeta functions, Bernoulli and Fibonacci numbers, Lambert’s W, the error function, and the Chebyshev, Hermite, Laguerre, and Legendre orthogonal polynomials (no more need to carry heavy printed tables), + many statistical distributions and their inverses: Poisson, Binomial, Geometric, Cauchy-Lorentz, Exponential, Logistic, Weibull, Lognormal, and Gaussian, + programmable sums and products, first and second derivatives, solving quadratic equations for real and complex roots, + testing for primality, + integer computing in fifteen bases from binary to hexadecimal, + extended date and time operations and a stopwatch3 based on a real-time clock, + financial operations such as mean rate of return and margin calculations, + 88 conversions, mainly from old Imperial to universal SI units and vice versa, + 50 fundamental physical constants as accurate as used today by national standards institutes such as NIST or PTB, plus a selection of important constants from mathematics, astronomy, and surveying, + Greek and extended Latin letters covering the languages of almost half of the world’s population (upper and lower case in two font sizes), plus mathematical symbols. A beginner manual can be downloaded at http://sourceforge.net/projects/wp34s/files/doc/WP_34S_Beg_Guide.pdf and a full, very complete version at http://sourceforge.net/projects/wp34s/files/doc/Manual_wp_34s_3_1.pdf

About

RPN

This app simulates a legendary scientific calculator, offering photo-realistic visuals and advanced functions like integration and root finding. It includes built-in programs and extensions for enhanced usability, making it a powerful tool for complex calculations.

Highlights
  • Photo-realistic look-and-feel
  • Programmable with 999 steps
  • Integration and root solving
  • Built-in application programs
  • Live register view
  • Program library and backup
  • Sharing via email, AirDrop, Dropbox
Features
Read full description

RPN-34 CE is the first photo-realistic simulation of Hewlett-Packard's popular mid-range scientific calculator HP-34C for the iPhone. Produced from 1979 through 1983, it was the "Basil" member of the third-generation HP calculators known as the "Spice" series. It was the first pocket-calculator ever capable of doing integration and root finding. While the simulator works like the original calculator, a number of carefully designed extensions, along with the tremendously improved speed, make it joy to use even today. RPN-34 CE comes with the programs of HP's "Applications", "Mathematics", "Surveying", "Student Engineering", and "Statistics" application books built-in! Handbooks may be downloaded from CuVee Software's website. Features: • Photo-realistic look-and-feel • Programmable (999 steps), subroutines, 12 labels, 10 flags • 100 registers, "continuous", with full store/recall arithmetic • "Live" register view • Program listing view with intelligent navigation • Program library, easily backed-up via iTunes • Store and retrieve any number of programs • Sharing: e-mail, AirDrop, Dropbox, copy, paste, print • 62 programs pre-installed (53 original HP) Calculator functions: • Integration, root solving • Statistics (mean, standard deviation, linear regression, normal distribution) • Factorial of any number (normal and logarithmic) • Trigonometric and hyperbolic functions (degrees, radians, grads) • Polar/rectangular conversions • Inverse, square root, logarithm, exponential, pi • Storage arithmetic (both store and recall) • Statistics (average, standard deviation, y-estimate, linear regression) • Unit and hours conversions • 31 additional functions not found on the HP-34C, like time and sound Details: cuveesoft.ch/rpn34

Screenshots

WP 34s1 screens
RPN4 screens

Verdict

The call

The clearest difference is price: WP 34s at Free against RPN's $1.99. RPN's advantage is rating (5.0 vs 4.7). On review sentiment, ratings volume, update cadence and ads there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

WP 34s is free to download; RPN costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

RPN holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 29 and 14 respectively. Written reviews point the same way: 93% of WP 34s's written reviews are positive against 100% of RPN's.

UpkeepUpdate frequency

WP 34s ships an update every 4 months, RPN every 3 months. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
WP 34s versus RPN: the parameters behind the verdict, then further details
ParameterWP 34sRPN
PriceFree — better$1.99
Rating4.7 (29 ratings)5.0 (14 ratings) — better
Positive reviews92.6% of reviews100.0% of reviews — better
Number of ratings29 — better14
Update frequencyEvery 4 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.012.0
Further details — not scored
Size11 MB16 MB
Age rating4+4+
DeveloperPascal MeheutCuVee Software

Customer experience

WP 34s

All ratings28 ratings
Positive92.9%
Neutral0.0%
Negative7.1%
Written reviews27 reviews
Positive92.6%
Neutral0.0%
Negative7.4%

RPN

All ratings14 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

WP 34s

No in-app purchases

None

RPN

No in-app purchases

Questions

Is WP 34s free?
WP 34s is free to download, with no in-app purchases.
Is RPN free?
RPN costs $1.99, with no in-app purchases.
Which has better reviews, WP 34s or RPN?
RPN is rated higher. WP 34s averages 4.7 out of 5 from 29 ratings, while RPN averages 5.0 from 14 ratings.
Do WP 34s or RPN have ads?
Neither WP 34s nor RPN shows ads.
Which is updated more often, WP 34s or RPN?
WP 34s ships an update every 4 months, and RPN every 3 months. Most recently, WP 34s was updated on October 23, 2026 and RPN on October 24, 2026.

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