# RPN-65 SD — First programmable calculator! > iPhone simulation of the historic HP-65 programmable calculator with virtual cards and printer. (iPhone/iPad app by CuVee Software.) - Source: https://appshunter.io/ios/app/rpn-65-sd/id1176059659 (this page in markdown: same URL + `.md`) - Developer: [CuVee Software](https://appshunter.io/developer/424873503) - Category: Productivity, Utilities - Price: $2.99 - Rating: 5.00/5 from 8 App Store ratings · 3 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 62 MB - Languages: American English - Released: 2016-11-16 - Data updated: 2026-09-06 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/rpn-65-sd/id1176059659/reviews.md ## What is RPN? World's first pocket computer! Now running on your iPhone. RPN-65 SD is the iPhone version of RPN-65 Pro, the first complete simulation of Hewlett-Packard's stunning HP-65 programmable calculator for iOS. Produced from 1974 to 1977 at an initial price of $795 (that's close to $5,000 today!), the HP-65 was a breakthrough. Not only was it programmable, it also contained a motorized magnetic card reader - and still fit into Bill Hewlett's shirt pocket. Experience this revolutionary calculator on your iPhone. With over 180 original HP programs included with the app, you can get started right away. "A work of art. Fantastic!" (MacBreak Weekly, episode 572) Features: • Virtual program and data cards • Virtual 2000-line paper tape printer supports AirPrint • Powerful database-driven card manager • Create, delete, label, and organize a virtually unlimited number of cards • Sharing: e-mail, AirDrop, Dropbox, iTunes, copy, paste, print • Paste existing HP-65 listings into RPN-65 and run them • "Live" display of stack, memory registers, program counter, flags • Reads program and data cards created by RPN-65 Pro • Reads data cards created by RPN-67 Pro/SD and RPN-97 Pro Run RPN-65 SD in any of 4 modes: 1 - Just like the original HP-65 2 - Like the original HP-65, but at much higher speed 3 - With many user-interface improvements, like backstep key or jump to any program step 4 - "Super-65" with 999 program steps, 120 labels, 120 registers, nested subroutines, and much more For details, free program downloads, calculator handbook and much more, visit the RPN-65 website: cuveesoft.ch/rpn65 ## Key features - Virtual program and data cards - Virtual paper tape printer with AirPrint - Database-driven card manager - Create, delete, and organize unlimited cards - Sharing via email, AirDrop, Dropbox, iTunes - Paste and run existing HP-65 listings - Four distinct operating modes ## Chart rankings - #199 in Top Paid · Productivity (US App Store) ## Recent user reviews (3 of 3) All indexed reviews: https://appshunter.io/ios/app/rpn-65-sd/id1176059659/reviews.md ### 5/5 — Top!! *2024-03-21* Klasse Software, sehr aufwendig und ausgeklügelt. Alles wird gut erklärt, toll!! ### 5/5 — Lovely, useful—now with haptic key clicks! *2022-12-03* It seems just a few weeks ago I asked for haptic key click and now here it is! This is a nifty reminder of the satisfying “thunk” of the famously high quality keys of these classic physical calculators. ### 5/5 — My go-to calculator *2019-01-10* I’ve always been an HP calculator fan. My first calculator was a National Semiconductor RPN scientific. But I couldn’t afford the HP’s when I was in school. Now that I have an iPhone in my pocket every day, I don’t have as much need for a separate physical calculator. I’ve tried an HP-41c emulator that was somewhat disappointing. Andy Ihnatko recommended this one, so I gave it a shot. Graphically perfect. Keys are extremely responsive. The program card animation makes me smile. I somehow hit a button that put me in a weird mode. I couldn’t get out of it, so I emailed the developer. He got back to me within a day and helped me reverse my stupidity. I can’t recommend this one highly enough. ## Frequently asked questions about RPN ### What is RPN-65 SD? RPN-65 SD is an iPhone application that provides a complete simulation of the original Hewlett-Packard HP-65 programmable calculator. It aims to replicate the functionality and experience of this historic device. ### How much does RPN-65 SD cost? RPN-65 SD is a paid application and is available for $2.99. This one-time purchase grants you access to all its features and simulations. ### What devices does RPN-65 SD support? RPN-65 SD is designed to run on iPhones and iPods. It is compatible with iOS devices, offering a portable way to use this classic calculator. ### Does RPN-65 SD have ads? No, RPN-65 SD does not contain advertisements. As a paid application, it provides an uninterrupted user experience without any in-app ads. ### How often is RPN-65 SD updated? RPN-65 SD was last updated on March 8, 2026, with version 4.4.1. While specific update frequency isn't detailed, this indicates ongoing development and support for the application. ### What are the different modes in RPN-65 SD? RPN-65 SD offers four modes: exact simulation of the original HP-65, a faster version of the original, an improved UI mode with features like backstep, and "Super-65" with expanded capabilities. ### Can I share programs or data from RPN-65 SD? Yes, RPN-65 SD supports various sharing options including email, AirDrop, Dropbox, and iTunes. You can also copy, paste, and print your data and programs. ### What is the age rating for RPN-65 SD? RPN-65 SD has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content present. ## Version history (last 5 releases) ### 4.4.1 — 2026-03-08 After tapping “Don't Show Again,” the button will be hidden instead of appearing greyed out. ### 4.4 — 2025-10-17 • Improved compatibility with iPhone Air and iOS 26. ### 4.3 — 2025-05-11 • Faster startup – no delay until the first button press is recognized after switching on. • Card details view: new Cancel button in the Activities list allows easy dismissing. Or simply tap outside dialog. Bug fix: In program view (tap display in W/PRGM mode), selecting a label at the bottom didn't clear the current selection. ### 4.2 — 2025-03-07 • In "Plus" mode, results such as 9.99×10⁹⁹ now appear correctly rounded both in the display and on the printer for all decimal point settings, e.g. DSP 1 (in contrast to the original HP-65). • Certain calculations, e.g. 100⁷⁵, caused the app to crash. ### 4.1 — 2024-10-30 • (iOS 13 or later) The program listing view supports two fonts. Long-press the listing to switch. • Visual adjustments to iPhone 16 Pro and iPhone 16 Pro Max ## Apps similar to RPN | App | Rating | Price | Category | | --- | --- | --- | --- | | [SyncOnSet 5.0](https://appshunter.io/ios/app/synconset-50/id1460160860) | 1.7 (61) | Free | Productivity | | [OneTwoCount](https://appshunter.io/ios/app/onetwocount/id1454584180) | — | Free | Productivity | | [Jumpstash](https://appshunter.io/ios/app/jumpstash/id1465670860) | 4.2 (5) | Free | Productivity | | [Thetis Tools](https://appshunter.io/ios/app/thetis-tools/id1460268980) | — | Free | Productivity | | [ZappID](https://appshunter.io/ios/app/zappid/id1455029820) | — | Free | Productivity | | [Your Ashford BC](https://appshunter.io/ios/app/your-ashford-bc/id1452979480) | — | Free | Productivity | ## More apps by CuVee Software - [RPN-45 HD](https://appshunter.io/ios/app/rpn-45-hd/id424873500) - [RPN-70 HD](https://appshunter.io/ios/app/rpn-70-hd/id436127144) - [Smart Sudoku](https://appshunter.io/ios/app/smart-sudoku/id457564906) - [Vintage-45](https://appshunter.io/ios/app/vintage-45/id506402272) - [RPN-45 SD](https://appshunter.io/ios/app/rpn-45-sd/id509923051) - [RPN-67 NP](https://appshunter.io/ios/app/rpn-67-np/id603100249) All apps by CuVee Software: https://appshunter.io/developer/424873503 ## Related topics [touch rpn](https://appshunter.io/ios/topics/touch-rpn) --- *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 2026-09-06.*