WP 34s vs RPN
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
RPN
This app is a photo-realistic simulation of a classic scientific calculator, offering advanced programming capabilities beyond the original model. It includes a comprehensive set of mathematical functions and features for easy program management and sharing.
- Photo-realistic calculator simulation
- Fully programmable with 99 steps
- Extensive scientific and statistical functions
- Program library and sharing options
- Import and export programs
- 44 pre-installed programs
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RPN-32 CE is the first photo-realistic simulation of Hewlett-Packard's popular mid-range scientific calculator HP-32E for the iPhone. Produced from 1978 through 1983, it was the "Thyme" 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. Unlike the HP-32E, this version is fully programmable, running virtually all programs written for the HP-25! Features: • Photo-realistic look-and-feel • Programmable (99 steps), subroutines, flags, loop control, branching • Insert and delete steps with automatic address correction • 20 registers, "continuous", with unrestricted store/recall arithmetic • Indirect register addressing • "Live" register view • Program listing view • Program library view • Store and retrieve any number of programs • Sharing: e-mail, AirDrop, Dropbox, copy, paste, print • 44 programs pre-installed • Import GO-25 programs • Export programs to RPN-25 CE Calculator functions: • Statistics (mean, standard deviation, linear regression, normal distribution) • Factorial • Trigonometric functions (degrees, radians, grads) • Polar/rectangular conversions • Hyperbolics • Inverse, square root, logarithm, exponential, pi • Storage arithmetic (store and recall) • Percent change • Percentage of Total • Unit and hours conversions • Many additional functions not found on the HP-32 Details: cuveesoft.ch/rpn32
Screenshots
Verdict
The clearest difference is price: WP 34s at Free against RPN's $1.99. WP 34s also leads on ratings volume (29 vs 9). RPN's advantage is rating (5.0 vs 4.7). On review sentiment, update cadence, ads and in-app purchases 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
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.
RPN holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 29 and 9 respectively. Written reviews point the same way: 93% of WP 34s's written reviews are positive against 100% of RPN's.
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.
| Parameter | WP 34s | RPN |
|---|---|---|
| Price | Free — better | $1.99 |
| Rating | 4.7 (29 ratings) | 5.0 (9 ratings) — better |
| Positive reviews | 92.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 29 — better | 9 |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 | 12.0 |
| Further details — not scored | ||
| Size | 11 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Pascal Meheut | CuVee Software |
Customer experience
WP 34s
RPN
In-app purchases
WP 34s
No in-app purchases
RPN
No in-app purchases








