HP67 Calculator 2.0

Mike O'Shea

About this app

This calculator was a technical marvel when Hewlett-Packard released it back in 1976. This was a time when most students and engineers used slide rules to calculate logarithms and square roots. This calculator allowed users to do such calculations with the stroke of a key.

In addition, it was programmable and had magnetic card storage before the first personal computers came out. Pretty remarkable!

This faithful re-creation provides both new and old users with a way to re-live those days. It is still a very useful tool. Even more so now as you can print and share programs and also create charts! Plus sounds and animation.

Ratings and reviews

This is great work. I had one of these in the early 70's and used it as sea for astro navigation calculations. Mine eventually died and it was so pleasing to find it as an app for my phone. Thank you for all the work you put in to create it.

Very good simulation. I would like to know how can I reuse a card. For example, if I write a program and later I modify it, I don't see a way to use the same card. Apparently I have to label a new one and save the program. It would be nice to reuse the same card so it's not necessary to write the labels again. Thanks.

Keys hard to use; only small usable strike area. Better than free version but can't count on a press registering, which is critical for a calculator. Haptic feedback is slightly delayed and too long. With some polish this would be great but it's not good enough for serious use.