# Calculator RPN — user reviews > 45 indexed App Store user reviews of Calculator RPN by Benjamin Pisano, rated 4.70/5 from 48 ratings. - Source: https://appshunter.io/ios/app/calculator-rpn/id568690457/reviews - App overview in markdown: https://appshunter.io/ios/app/calculator-rpn/id568690457.md - Rating breakdown: 5★ 43 · 4★ 1 · 3★ 0 · 2★ 2 · 1★ 2 ## Newest reviews (11 of 45) ### 3/5 — Trig Function not correct *2024-10-12* Used this to build a bracket and discovered Sin45 is not equal to Cos45 according to this calculator. Fortunately I cut it too long not too short! Pretty basic function for a calculator to get wrong! **Developer response:** Hello, this issue stems from a misunderstanding of the calculator’s settings, which support both radians and degrees. As I explained via email, cos(45°) equals 0.7071, but if the calculator is set to radians, the result will differ. If you’re still experiencing issues, feel free to contact me at contact@snopia.net. The solution is readily available. Benjamin ### 3/5 — Fairly good but neglected *2021-08-23* This RPN calculator is fairly good but it's missing some important features such as STO and RCL. It could also really use a stay-on-top feature. I've communicated these to the developer but he doesn't seem interested in doing anything. ### 2/5 — Buena app pero.... *2021-01-23, version 4.6* Aver si quiero hacer una simple suma o resta Necesito el = Sin eso no puedo ver el resultado no me aparece el = ni el iPhone ni el iPad ni el Apple Watch ⌚️ Pequeño gran fallo sin = ### 3/5 — Moins de visibilité *2020-08-28* Quel dommage ! Depuis la dernière version, a cause de l’historique des opérations qui est sans fin, la lisibilité des résultats est devenue nulle. Moi qui visualisait l’évolution de 2 résultats d’opérations multiples, je ne vois plus rien que l’historique ! Et la commande editer qui affiche un - rouge ne fait rien du tout! J’adorais cette calculatrice, je ne peux plus m’en setvir **Developer response:** Bonjour, La dernière mise à jour apporte la possibilité de masquer l’historique des calculs pour plus de lisibilité et corrige le problème d’édition de la pile. J’espère qu’elle vous plaira. La prochaine fois, n’hésitez pas à me contacter à l’adresse contact@snopia.net pour plus de réactivité. ### 5/5 — RPN scientific calculator *2019-12-25, version 4.4* This app is a RPN scientific calculator. It works as expected. I am very pleased with it. ### 2/5 — Ofrecen pantalla negra, no la pude descargar? *2019-10-10, version 4.2* Favor enviar el link pata pantalla con fondo negro ### 5/5 — Trig functions *2019-10-01, version 4.2* +++++ ### 5/5 — Simple et efficace *2019-08-31* ... tout à fait dans l’esprit du RPN! Elle remplace avantageusement la calculatrice native de l’iPhone. ### 2/5 — Pas de séparateur des milliers ... *2018-11-13* ... ce qui rend vite l’utilisation laborieuse **Developer response:** Bonjour, Cette fonctionnalité a été ajoutée dans la dernière version de l’app. Si vous avez plus de questions ou de suggestions, vous pouvez nous contacter par mail à l’adresse contact@snopia.net ### 5/5 — Tried most RPN, like this best. *2017-09-20, version 3.0.6* This is a well thought out RPN, and the best of all the ones I have tried (most). Not over complicatedvwith options but has all the ones I want. I really like the appearance, although maybe the Enter key could have a bit of differentiation from other keys. I particularly like the large workspace, and clear visibility of the registers and calculation history. ### 5/5 — Genial ! *2016-10-15* Enfin une calculatrice RPN digne de ce nom ! Les accros des HP28 et autres 48 retrouveront leurs marques... Avec un gestion de la pile bien plus simple ## Most critical reviews (10 lowest-rated) ### 1/5 — Rechnen sollte er schon können. *2026-01-30, version 4.6.8* Der sin von 90° ist 0,89. Nicht brauchbar. Zumindest auf der Apple Watch. Schade ums Geld. ### 1/5 — Settimng the size of the calculator on acreen *2023-10-24, version 4.6.8* When this app opens, it takes up far too much of the screen. This means you have to continually re-size it every time you open it! It needs a a way to pre-set the size. A great drawback to what is a useful calculator. Website and support can't be reached which doesn't help. ### 1/5 — incorrect results *2022-01-09* why do 24!, 30!, and 52! all give the same result **Developer response:** Hi, I apologize for the issue you’re encountering. An update has been sent to Apple to fix the bug and will be available soon. If you have any other issue, question or suggestion, don’t hesitate to contact me at contact@snopia.net Sincerely, Benjamin ### 1/5 — No ‘=‘ sign….. *2021-12-26* Wow **Developer response:** Hi, this is not a traditional calculator. It uses RPN, witch means that you have to first enter your numbers in the stack and then perform your operation. There is no need for the equal sign. If you want to calculate 1 + 2, you have to type in this order: 1 ENTER 2 + This mode is used a lot in engineering and economy to perform large calculus faster. There are a lot of tutorial on the web about RPN. Benjamin ### 1/5 — Très bien *2021-11-24* Bonne application, une des meilleures de ce type. ### 1/5 — Crash au premier appui sur une touche *2021-09-03* A fuire une pure arnaque, la calculette crash systématiquement à la saisie du 2eme chiffre.... (sur macbook Air Big Sur 11.5.2) **Developer response:** Bonjour, Je vous prie de bien vouloir m'excuser face à cet incident. N'hésitez pas à me contacter à l'adresse contact@snopia.net pour que nous puissions régler ensemble votre problème. Cordialement, Benjamin ### 1/5 — Keine trigonometrischen Funktionen *2017-12-22, version 3.0.6* Keine trigonometrischen Funktionen ### 1/5 — Pb de calcul *2012-12-18* Il semble que la fonction exponentielle calcule faux si on e puissance 1, on trouve 1 et non pas la valeur de e (2,7...) alors ? Si on fait Ln(1000) il y a également un problème Si on fait exp(Ln(x), on ne retombe pas sur la valeur de x Dommage ... Ça avait pourtant l'air bien. ### 2/5 — Can’t change decimal places *2025-03-13* Can’t reduce decimal places ### 2/5 — Works but still has problemsorks but still has problems *2023-05-05* Functions properly as an RPN calculator that puts an expression under the x register which summarizes the operations. Nice touch but that's pretty much where it ends. On computer screen the calculator opens with ridiculously wide buttons in a window that takes up a third of the screen. Sure it can be resized but next time it opens at maximum size again. Setting includes option to specify number of decimal places from 15 to 4. It would be nice if this could be set to 2 for financial calculations, although it's an academic argument since this setting doesn't change anything. ## Most praised reviews (10 highest-rated) ### 5/5 — Parfait *2025-01-23* Interface claire et parfaitement fonctionnelle (notamment avec le pavé numérique, sous Mac OS). ### 5/5 — A Pleasure To Use *2024-03-01* If there was a prize for most elegant iphone calculator, this would definitely win. No bloat, but all the features you could want, and naturally organized. The UI is such a simple and thoroughly designed implementation of a touch-screen calculator, not just a phone version of an HP. I never have to squint or hunt for a function. Everything is as intuitive as it could be. ### 5/5 — excellente calculatrice *2024-01-12* Je suis habitué à la notation polonaise inversée, grace à ce petit logiciel je retrouve mes marques. J'apprécie partculièrement le nombre de lignes qui, à mon avis pourrait être augmenté. ### 5/5 — Easy to use, full featured scientific calculator. *2022-04-21* I ### 5/5 — Enfin ! *2022-03-08* Enfin une calculatrice avec du contenu en français. Merci de penser que l’on peut avoir des calculatrices qui gère aussi le français dans les paramètres. Également de bonne idée pour la gestion de la pile. Bravo. ### 5/5 — Perfect RPN Calculator App *2021-10-26* This is the best RPN calculator app I’ve ever used. The layout is clean, intuitive, and the buttons are clear and concise. The calculation steps/history immediately tells me if I’ve accidentally fat finger any keys while the “always on” feature (the phone stays on while the app is up) is a brilliant touch. This avoids the constant nuisance of logging into my phone every two minutes while I’m doing calculations. I use this handy piece of software nearly every day for work and home and it’s simply fantastic. My only wish is that it did unit conversions but it’s such a small gripe that it really should be a footnote because the rest of the app is that great. If you know how to use RPN, you won’t regret getting this calculator. ### 5/5 — Notation polonaise inverse *2021-04-26* Bon produit cela me rappelle ma hp 41 qui marche toujours ### 5/5 — Don't care about past evaluations, now he is perfect. A perfect calculator. *2021-02-15* Don't care about past evaluations, now he is perfect. A perfect calculator. ### 5/5 — Great RPN calc *2020-09-06* This is just what I needed, a very stable RPN calculator with a full stack visible. ### 5/5 — Indispensable *2020-04-06* Quand comme moi on a fait le lycée avec une calculatrice RPN, on peut difficilement revenir en arrière. En tout cas moi je n’y arrive pas ! J’ai essayé plusieurs calculatrices RPN et celle ci me convient parfaitement. Facile et rapide. Super. Merci au développeur! --- *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 2026-08-20.*