Looks good but sounds terrible
Response from developer
Thank you for the review. The sounds are actual recordings of an original hp 67. However, as the original is already quite dated (especially the magnet card drive), the sounds might not be the same anymore. Also, the recordings probably cannot capture the true sound. You can disable the sound in the settings or after pressing h E.
RPN!!! It has Reversed Polish Notation
Anyway, as far as I can tell, this is a nearly flawless implementation of one of absolutely best hardware calculators ever.
But pardon me for asking for support, is there documentation somewhere in the program?
Oh, for those who aren’t familiar with Reverse Polish Notation, (not a slur, it was invented by a Polish guy), and if you do much more than add - subtract, multiply, divide, you owe it to yourself to learn RPN well enough to make a judgement. As an ex-land surveyor, math guy and programmer, I can tell you that it’s worth learning. It’s much more flexible than algebraic notation.
This is a great app
A fabulous old beast
This superb emulation of one of HP's best, the legendary 67, comes with several of the most useful program cards, and replicates the original operation so accurately that watching the display during calculation imbues the thing with a life of its own and whisks me back to school in its memory. Unlike mere mortals though, it can always be trusted to come up with correct solutions.
Considering the above, my disappointment that it does not rotate for landscape view on an iPad seems churlish. I almost always delete 'portrait only' apps but this wonderful thing really is a genuine exception.
Legendary 67 is an outstanding app; a credit to its author and his perfectionism.
Great calculator accessory
Really nice emulator
Thanks for Hp 67 app!
Piece of crap
A calculator for the HP style minds.
Great job!
Great App
Excellent HP-67 Calculator
I love this one
Nice Classic HP Calculator for iPhone
Excellent Reproduction.
The best part, is even the card reader functions and you can write and record your programs on a virtual magnetic card, that even shows your programming steps.
Also, the developer is very easy to get in touch with, and is receptive to feedback, what else can you ask for.
