RPN-67 Pro

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.

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.

Anyone who is a long term HP-67/97 card programmable scientific calculator user, like me, would be absolutely delighted with this APP for the iPad. The author of this APP has implemented an exact simulation of the HP-67 hardware and has also provided optional enhancements, with additional maximum programming steps, faster execution speeds and enhanced output display options. This APP would be a great backup for any HP-67/97 owners/users as these are no longer supported, but they may have existing useful card programs they could easily run on the APP. All of the original HP Application Pacs library program listings and vendor support are available on the website. The latest version of the APP has a large number of convenient scientific constants built-in. jjb-oz

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.

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...

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.

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.

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!

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.

Excellent emulator. Great customer service. Questions were answered immediately!