# R47 RPN Calculator — HP Program Editor & Tutorials > HP-style RPN scientific calculator with program editor and tutorials for iOS. (iPhone/iPad app by MARCEL DAN.) - Source: https://appshunter.io/ios/app/r47-rpn-calculator/id6763615664 (this page in markdown: same URL + `.md`) - Developer: [MARCEL DAN](https://appshunter.io/developer/1895318613) - Category: Education, Utilities - Price: Free with in-app purchases - Rating: 5.00/5 from 23 App Store ratings · 1 written reviews indexed - Age rating: 4+ - Requires: iOS 15.6 · 61 MB - Languages: American English - Released: 2026-05-02 - Data updated: 2026-08-23 - Monetization: freemium - User reviews in markdown: https://appshunter.io/ios/app/r47-rpn-calculator/id6763615664/reviews.md ## What is R47 RPN Calculator? An RPN calculator isn't just a tool for getting answers like a traditional exam calculator—it's a way of thinking. It mirrors how you naturally break problems into steps, making it more like an extension of your mind than a shortcut. A full HP-style RPN scientific calculator — on iPhone and iPad, offline, with no ads or tracking. 47 Calculator is a programmable Reverse Polish Notation scientific calculator. Trigonometry, logarithms, statistics, probability, finance, complex numbers, base conversions, matrix operations, numerical solvers — the full 47-series instruction set, in your pocket. Free includes the calculator, a program editor for reading and writing 47-series programs, reference documentation, and a full tutorial library — probability and statistics, finance, numerical methods, programming patterns, advanced RPN techniques. The Pro version adds the Explorer — browse every menu, flag, mode, and operation the engine supports, searchable and cross-linked. Works fully offline after first launch. Light and dark themes. No ads, no third-party analytics, no tracking, no account required. ## Key features - RPN scientific calculator - 47-series instruction set - Program editor - Tutorial library - Offline functionality - Light and dark themes ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Pro Pack | $4.99 | one-time | ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/r47-rpn-calculator/id6763615664/reviews.md ### 5/5 — Fantastic Calculator *2026-06-04* This is my new favorite calculator - and I have most of them! Very well done! ## Frequently asked questions about R47 RPN Calculator ### What is RPN and how does R47 RPN Calculator use it? RPN, or Reverse Polish Notation, is a calculator input method where operators follow operands. R47 RPN Calculator uses this method to mirror how you naturally break down problems into steps, making it an extension of your thinking process rather than just a shortcut. ### Does R47 RPN Calculator work offline? Yes, R47 RPN Calculator works fully offline after its initial launch. This ensures you can access its powerful scientific calculation and programming features without needing an internet connection. ### What advanced functions are available in R47 RPN Calculator? The calculator supports trigonometry, logarithms, statistics, probability, finance, complex numbers, base conversions, and matrix operations, all within the full 47-series instruction set. ### What is included in the free version of R47 RPN Calculator? The free version includes the core RPN calculator, a program editor for reading and writing 47-series programs, reference documentation, and a comprehensive tutorial library covering various mathematical and programming topics. ### What does the Pro version of R47 RPN Calculator offer? The Pro version unlocks the 'Explorer' feature, allowing you to browse every menu, flag, mode, and operation the calculator engine supports. This feature is searchable and cross-linked for easy navigation. ### Is R47 RPN Calculator suitable for younger users? R47 RPN Calculator has an age rating of 4+, making it accessible for a wide range of users. Its educational focus on problem-solving can be beneficial for learning. ### How often is R47 RPN Calculator updated? The latest version, 1.9, was released on 2026-06-10, indicating active development and regular updates to improve functionality and reliability. ### Does R47 RPN Calculator have ads? No, R47 RPN Calculator is advertised as having no ads. It also avoids third-party analytics and tracking, and does not require an account for use. ## Version history (last 5 releases) ### 1.10 — 2026-08-20 -Updated firmware to 00.109.04.00b0 -Updated Rejig to 0.30.1 -UI Updates -New Themes ### 1.9 — 2026-06-10 v1.9 -Updated Firmware to 00.109.03.03b0 -Rejig was updated to 0.27.0 -Added a Random Theme Generator -Reorganized theme sliders -UI improvements -Added Long press to copy X to clipboard -Updated Keyboard Shortcuts -Improved Pause in programs ### 1.8 — 2026-05-27 v1.8 -Added Label Mode in Themes to hide unfocused labels -Updated sound haptic feedback -Alphabet letters highlight for text input modes -Added a Command search to the Explorer tab -Shortcut keys will recognize the keyboard in Alpha Search Mode -Changed the color sliders to collapse for more space -Added Button Text, Color, Size, & Brightness sliders ### 1.7 — 2026-05-24 v 1.7 -Added Buzz, Play, and Volume support -Added R47 Faceplate theme -Added Matrix size guard -Updated Rejig to 0.25.3 -Added a Sound tutorial -Update haptic feedback response ### 1.6 — 2026-05-21 v 1.6 -Added CHARS items to the Program Editor Reference -Updated Rejig to 0.25.2 -Added Rejig flags to the Program Editor -Redesigned the software layer between the LCD and firmware -Added an iOS file helper to XPORTP -Fixed MacOS and iOS file filters for .p47 files -User Interface adjustments ## Related topics [r47 rpn calculator](https://appshunter.io/ios/topics/r47-rpn-calculator) · [r47](https://appshunter.io/ios/topics/r47) · [hp rpn calculator](https://appshunter.io/ios/topics/hp-rpn-calculator) · [touch rpn calc](https://appshunter.io/ios/topics/touch-rpn-calc) · [rpn calculator](https://appshunter.io/ios/topics/rpn-calculator) --- *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 2026-08-23.*