# RPN-67 Pro — Vintage Programmable Calc > Faithful simulation of the HP-67 programmable calculator for iPad. (iPhone/iPad app by Willy Kunz.) - Source: https://appshunter.io/ios/app/rpn-67-pro/id603103972 (this page in markdown: same URL + `.md`) - Developer: [Willy Kunz](https://appshunter.io/developer/424873503) - Category: Productivity, Utilities - Price: $4.99 - Rating: 4.33/5 from 6 App Store ratings · 20 written reviews indexed - Age rating: 4+ - Requires: iOS 12.0 · 78 MB - Languages: English - Released: 2013-03-01 - Data updated: 2026-06-01 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/rpn-67-pro/id603103972/reviews.md ## What is RPN? A dream calculator of the 70's, priced at $1,900 in today's dollars, now on your iPad! RPN-67 Pro is the first complete simulation of Hewlett-Packard's legendary HP-67 programmable calculator for iOS. Produced from 1976 to 1982, the HP-67's features coupled with its capability to store programs on magnetic cards made it a huge success among scientists, engineers and other professionals. Thousands of programs were written for it. Now you can run them right on your iPad, with more ease and faster than ever before. To get you started quickly, download hundreds of program cards from our website for free. What users said: "I am a collector of HP emulators on my iPad. The HP-67 is beyond spectacular!" "What an application! Perfect visual experience, perfect emulation, even the clicks are pleasant." "In many ways, the app is even better than the original - much faster, better and easier programming". RPN-67 Pro is fully compatible with RPN-97 Pro, its companion simulator of the HP-97 calculator. Features: • Virtual program and data cards • Virtual paper tape printer supports all HP-97 printer modes • Powerful database-driven card manager • Create, label, and organize a virtually unlimited number of cards • Use iTunes to effortlessly save entire card collections on your Mac/PC • Sharing: e-mail, AirDrop, Dropbox, copy, paste, print • Formatted listing clearly showing labels and targets of branches • E-mail listings and let the recipient paste the text right into RPN-67 • Print listings on any AirPrint-compatible printer • Program listing on paper tape shows subroutine nesting • Edit paper tape • E-mail paper tape, or print it via AirPrint • Cut/copy/paste displayed value or program steps • Paste existing HP-67 or HP-97 listings into RPN-67 and run them • "Live" display of stack, memory registers, program counter, flags • Show program usage notes • 30 selectable background images, even add your own • Fast: 0.8 secs vs. 6 mins (iPad Pro vs. HP-67, determinant of 5x5 matrix) • Low-battery indicator (iPad charge 10% or less) • Compatible with RPN-67 SD and RPN-97 Pro, CuVee Software's HP-97 simulation • Supports external hardware keyboard While RPN-67 Pro works like a real HP-67, changing a simple setting will turn the app into a super-charged HP-67: • Up to 999 program steps, 8 subroutine levels, 6 additional flags (F4...F9) • 100 additional registers • 100 additional labels • 100 built-in constants and conversions • More than 150 additional powerful operations and functions Plus: • 15 commands to print and manipulate any range of extended registers • Unrestricted register arithmetic • Exchange x with any register • Complex numbers, hyperbolic functions • Non-volatile memory - stack, registers, program, flags, paper tape • Status indicators for prefix keys (f, g, h, STO, RCL, etc.) • Display showing thousands separators (optional) • Text output on paper tape in 10 colors, even simple plotting • Stack-of-stack: push/pop the entire stack on internal stack (4 levels) • Single-step into subroutines (optional) • Powerful debugging aids, including 10 breakpoints with counters • Keycodes translated to command name while entering or single-stepping a program • Change the duration of the PAUSE command • Cancel SST or BST operation by simply sliding your finger off the depressed key • Compress constants in programs into a single step (reversible) • Use existing programs in text format by a simple paste operation RPN-67 Pro comes with more than 130 programs pre-installed, including HP Standard Pac, HP Business Decisions Pac, HP Math Pac I, HP Stat Pac I, and HP Surveying Pac I. The simulator has been verified to correctly run the examples given in HP Civil Engineering Pac I, HP Clinical Lab Pac, HP E.E. Pac I, HP Games Pac I, HP M.E. Pac I, HP Navigation Pac I, as well as large number of programs published in Users' Library Solutions. For more information and free program downloads visit the RPN-67 website: cuveesoft.ch/rpn67 ## Key features - Virtual program and data cards - Virtual paper tape printer - Database-driven card manager - Save card collections to Mac/PC - Formatted program listings - Print listings via AirPrint - Live display of stack and registers ## Recent user reviews (10 of 20) All indexed reviews: https://appshunter.io/ios/app/rpn-67-pro/id603103972/reviews.md ### 5/5 — Excellent emulation *2024-05-24, version 6.9* The pro version is just great - has a lot of extra cards with an extensive manual on each card’s functions, i.e. TVM calculation card etc. There are a lot of customisations available to the core HP 67 calculator. Thanks for the hard work of putting this all together, this seems like the only calculator [emulation] one would ever need. The calculator skin is also great, and the red display makes it authentic. Looking forward for future versions. ### 5/5 — Back to 5 stars *2020-03-18* Yay, well done. Portrait mode is back. It seems to me that if you had to drop a mode, for the 67 it would have made more sense to drop landscape mode. Anyhow, thanks so much for restoring it. **Developer response:** One star because of a single feature you're missing?? Blocking portrait mode was not an arbitrary decision. It was forced by a number of graphical issues showing up when running in iOS 13. In order to release an update supporting Dark Mode and the new file sharing features in time, portrait mode was disabled. Meanwhile, it has been fully restored, working better than ever. And to answer your question: I'm not on drugs and never will be. ### 5/5 — Love It *2019-01-12, version 4.9* I used the HP67 at college back in the 70s, this emulator is just like the real thing. Well done. ### 5/5 — Best iPad Calculator *2018-04-29* This developer is terrific. His apps are really great. The HP-67 is a good calulator made great by the extras added by this developer. The calendar functions are amazing and make it very much like the HP41 or 42s. The integrated share functions make it very easy to send a listing or a copy of the "card" created or a listing. The developer's efforts are truly a labor of love! There is a version of this app for the iPhone and the share feature makes it easy to copy a program developed on one device to the other device or to a Mac for backup... ### 1/5 — No longer works *2016-01-26* This worked beautifully until the iOS 8.4 update. Now the program closes as soon as you open it. The funny thing is, the free version still works perfectly! So until this is fixed, get the free one instead. ### 1/5 — Undecided *2015-10-05, version 3.2* I tied to write a review and gave the app 3 stars, but it wouldn't let me post it. Therefore I have downgraded my review to one star. The app is okay for the small price, but there are many program cards on the developer website which you should be able to import directly from the app, rather than having to connect to a computer and fiddle around. ### 5/5 — Like Owning a New HP-67 *2015-02-24* This is by far the best emulation of the classic HP-67 scientific calculator that I have found. When you consider the reliability, speed, and capacity advantages of using the included virtual magnetic card reader/writer (and virtual thermal printer), versus the physical original, it is clear that this app provides exceptional value. That conclusion is only further reinforced when one considers the many performance upgrades, the ready access to the HP applications library, and the built-in program reference guidance provided. A math-oriented young person contemplating a technical career could find their areas of greatest interest by familiarizing themselves with the contents of the classic application pacs. ### 4/5 — Superb emulator of Hp-67! *2015-01-03, version 2.7* I own an HP-67 calculator and have used it a great deal over the last few decades. This app does a wonderful job of emulating the HP-67 functions, and having programming support is such a great feature. In many ways, the app is even better than the original - much faster, better and easier programming, and not having to pay for all those pre-programmed function cards. Such a deal! ### 5/5 — a labor of love *2014-09-24* I love this app as it fabulously recreates one of the most amazing programmable calculators that ever was. Some of us grew on programmable calculators and the HP67 was the king. The app also includes many of the original libraries of magnetic cards. Thank you for creating this! ### 5/5 — Outstanding *2014-07-09* Every update adds something useful. Design, vision, execution all outstanding. How come the earlier reviews disappear? The most recent update makes an excellent product even better. Breakpoints with a count is very relevant. Not just the core product but every enhancement is well thought out and well executed. I wish there was detailed help attached to the app. Would make it more convenient than having to go to an external site. ## Frequently asked questions about RPN ### What is RPN-67 Pro? RPN-67 Pro is a complete simulation of the Hewlett-Packard HP-67 programmable calculator, designed for iPad. It brings the functionality of this 1970s professional tool to a modern device. ### Does RPN-67 Pro have ads? No, RPN-67 Pro is ad-free. It provides an uninterrupted user experience for its professional-grade calculator simulation. ### What devices does RPN-67 Pro support? RPN-67 Pro is exclusively available for iPad. It is optimized for the iPad's larger screen and processing capabilities. ### How much does RPN-67 Pro cost? RPN-67 Pro is a paid application, priced at $4.99. This one-time purchase grants access to its full suite of features. ### Can I run existing HP-67 or HP-97 programs in RPN-67 Pro? Yes, RPN-67 Pro allows you to paste existing HP-67 or HP-97 listings directly into the app and run them. It also supports hundreds of free program cards downloadable from their website. ### How often is RPN-67 Pro updated? RPN-67 Pro was last updated on March 3, 2026, indicating a commitment to ongoing development and support. Users can expect continued improvements and compatibility. ### What are the advanced features of RPN-67 Pro? Beyond basic emulation, RPN-67 Pro offers up to 999 program steps, 8 subroutine levels, 100 additional registers, complex numbers, and hyperbolic functions, making it a super-charged version of the original. ### What is the user sentiment for RPN-67 Pro? User reviews highlight RPN-67 Pro as 'beyond spectacular' with a 'perfect visual experience' and 'perfect emulation.' Users also praise its speed and ease of programming compared to the original device. ## Version history (last 5 releases) ### 7.5 — 2026-04-09 • In the Card Manager ("Cards"), the green label fields of user cards may be edited in W/PRGM mode, with "Show Card Content" set to off. • Improved support of Silicon Macs. ### 7.4 — 2026-03-03 • In the Card Manager ("Cards"), quickly scroll to the program code for any user key. For HP program cards, tap the desired label letter A..E for LBL A..LBL E. Long-press for LBL a..LBL e. For user program cards, simply tap the desired green label field. • Visual optimizations for iOS 26. ### 7.3 — 2025-05-11 • Faster startup – no delay until the first button press is recognized after switching on. ### 7.2 — 2025-03-09 • In "Max" 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. SCI DSP 1 (in contrast to the original HP-67). • Certain calculations, e.g. 100⁷⁵, caused the app to crash. • Fixed the info screen on the main view not showing up correctly. ### 7.1 — 2024-11-04 • In "Cards": Easier navigation to first, current, or last program step (tap "?" for details). • Fixed: The Info screen on the main view didn't show up correctly. ## Apps similar to RPN | App | Rating | Price | Category | | --- | --- | --- | --- | | [DB48X](https://appshunter.io/ios/app/db48x/id6615086535) | 4.7 (3) | $4.99 | Productivity | | [RPN 28x Calc](https://appshunter.io/ios/app/rpn-28x-calc/id529927583) | 5.0 (30) | $6.99 | Productivity | | [i41CX](https://appshunter.io/ios/app/i41cx/id292619450) | 4.6 (43) | $7.99 | Productivity | | [DB40X](https://appshunter.io/ios/app/db40x/id6624315901) | 4.7 (7) | Free | Productivity | | [WP 34s](https://appshunter.io/ios/app/wp-34s/id620255094) | 4.7 (28) | Free | Productivity | | [DB50X](https://appshunter.io/ios/app/db50x/id6625971367) | 5.0 (7) | $9.99 | Productivity | ## More apps by Willy Kunz - [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 Willy Kunz: https://appshunter.io/developer/424873503 --- *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 2026-06-01.*