# WP 34s > Comprehensive RPN scientific calculator with advanced functions for various fields. (iPhone/iPad app by Pascal Meheut.) - Source: https://appshunter.io/ios/app/wp-34s/id620255094 (this page in markdown: same URL + `.md`) - Developer: [Pascal Meheut](https://appshunter.io/developer/620255097) - Category: Productivity - Price: Free - Rating: 4.70/5 from 28 App Store ratings · 27 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 11 MB - Languages: American English - Released: 2013-03-22 - Data updated: 2026-06-11 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/wp-34s/id620255094/reviews.md ## What is WP 34s? 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 ## Key features - 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 ## Recent user reviews (10 of 27) All indexed reviews: https://appshunter.io/ios/app/wp-34s/id620255094/reviews.md ### 4/5 — I have 2 questions: *2025-10-12, version 1.19* How do you start the stopwatch? How do you turn off RPN mode? ### 5/5 — a few things missing *2025-04-22, version 1.19* no double precision integer mode. nextprime crashes above 2^63. But it’s the best there is. ### 5/5 — Perfect *2024-03-25, version 1.19* I wished for haptic feedback :-) and here it is. Thank you, thank you, now it’s perfect :-) ### 4/5 — Good overall with some potential improvements *2022-09-07, version 1.18* It would be great to round off this great looking and working WP 34s with a few features from similar emulated calculators (like Free42 and HP-12C): - Printing simulation into a separate screen and saving to image and “log” files - Shift Highlight: green and orange are somewhat similar (for some of us), so when a shift is activated, highlight the affected functions with higher intensity (brighter) color. Other potential improvements: - annunciators could be a little bigger - multi-line stack, registers or program views ### 5/5 — First class *2022-04-09, version 1.18* This is an emulation of one of Hewlett Packard's most powerful machines - now on steroids, taking advantage of modern computing. Beyond being fully programmable, it has a bewildering amount of functionality, so it's great to find vitally important user manuals are available. It works just like it's cousin here in the App Store: the WP31-S, except this has even more. The only downside: it takes a while to become familiar with the keypad. ### 5/5 — Fantastica calcolatrice programmabile *2021-01-25, version 1.18* Per usarla al meglio bisogna studiare il relativo manuale, peraltro ben fatto. La calcolatrice ha una quantità smodata di funzioni e, anche se ben organizzate, possono portare un po’ di confusione. Se le funzionalità avanzate dovessero distrarre troppo, c’è la versione 31S degli stessi autori che presenta meno funzioni e un’interfaccia utente più semplice, che ho praticamente sostituito alla calcolatrice standard di apple. ### 5/5 — For when thé hp48 *2021-01-06, version 1.18* Perfect copy but miss a second Line for a perfect RPN calculation ### 4/5 — With the latest update, lists are unreadable *2019-11-19, version 1.15.2* I have the HP30B and a converted WP34S. The only issues with this update is that all the pick lists are darkened and are not readable, for example, key in h and X.FCN and you won’t be able to read the choices. ### 5/5 — Probabilmente la migliore *2019-03-25, version 1.14* Questa app è il risultato di un progetto brillante quanto affascinante: riprogrammare una vecchia calcolatrice scientifica HP con un software di nuova generazione. Il risultato è un calcolatore (RPN) programmabile, di alta precisione e di incredibile potenza. La app riproduce, se non migliora addirittura, tutto ciò. Eccellente. ### 5/5 — The best RPN calc app! *2019-02-18, version 1.14* The best calc app for RPN afficianandos. It's what i use when I don't have my physical WP34s with me. ## Frequently asked questions about WP 34s ### What is WP 34s? WP 34s is a powerful and complete implementation of a classic RPN scientific calculator. It offers an expanded function set based on high-end programmable RPN calculators, incorporating programmer functions, fraction mode, probability distributions, and a stopwatch. ### What kind of functions does WP 34s offer? WP 34s includes functions for mathematics (e.g., Beta and Zeta functions, orthogonal polynomials), statistics (various distributions and their inverses), programming (base conversions, primality testing), financial operations, unit conversions, and physical constants. ### Is WP 34s suitable for programming tasks? Yes, WP 34s includes specific programmer functions such as integer computing in fifteen bases from binary to hexadecimal, and testing for primality, making it useful for programming-related calculations. ### Does WP 34s support different number bases? Yes, WP 34s supports integer computing in fifteen bases, ranging from binary (base 2) to hexadecimal (base 16), catering to various programming and mathematical needs. ### Can WP 34s perform statistical calculations? WP 34s offers numerous statistical functions, including many distributions and their inverses like Poisson, Binomial, Geometric, and Gaussian, along with programmable sums and products. ### What are the supported devices for WP 34s? WP 34s is available on iOS devices, including iPhone, iPad, and iPod. The app was last updated on March 24, 2024, with version 1.19. ### How often is WP 34s updated? WP 34s was last updated on March 24, 2024, indicating active development and maintenance. The current version is 1.19. ### Does WP 34s have ads? No, WP 34s is free and does not contain advertisements. It is a straightforward application focused on providing calculator functionality. ## Version history (last 5 releases) ### 1.19 — 2024-03-24 Now supports haptic feedback ### 1.18 — 2020-09-28 Fixes some problems with iOS 14 ### 1.17 — 2019-12-06 Restored support for older 32 bits devices ### 1.16 — 2019-11-20 Menus & infos now work in dark mode ### 1.15.2 — 2019-11-09 Fixed Changelog ## Apps similar to WP 34s | App | Rating | Price | Category | | --- | --- | --- | --- | | [JRPN 16C](https://appshunter.io/ios/app/jrpn-16c/id6484402697) | 4.3 (3) | Free | Productivity | | [RPN-70 HD](https://appshunter.io/ios/app/rpn-70-hd/id436127144) | 5.0 (3) | Free | Productivity | | [RPN-67 NP](https://appshunter.io/ios/app/rpn-67-np/id603100249) | 3.7 (3) | Free | Productivity | | [i41CX+](https://appshunter.io/ios/app/i41cx-plus/id289068865) | 4.8 (100) | $24.99 | Productivity | | [JRPN 15C](https://appshunter.io/ios/app/jrpn-15c/id6484504019) | 5.0 (5) | Free | Productivity | | [DB50X](https://appshunter.io/ios/app/db50x/id6625971367) | 5.0 (7) | $9.99 | Productivity | ## More apps by Pascal Meheut - [WP 31s](https://appshunter.io/ios/app/wp-31s/id973621300) All apps by Pascal Meheut: https://appshunter.io/developer/620255097 ## Related topics [pascal meheut](https://appshunter.io/ios/topics/pascal-meheut) · [034](https://appshunter.io/ios/topics/034) · [s34](https://appshunter.io/ios/topics/s34) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*