42s RPN Calculator

Update March 16, 2015: I knocked this down a star because its form factor needs to be modified to fit the larger screens of the iPhone 6 and 6 plus. My only complaint! I have an HP 42s and I hardly ever use it anymore since this is such an excellent rendition of this calculator. I have tried several of the other RPN calculators in the app store, and this one is by far the best. Also, Mr. Foster offers excellent support and prompt answers to questions and problems. BTW, there is a knock off of this on the app store, called RPNCalc 42s. It is a copy of an earlier version, and offers no support--I have visited the web site for this. Buyer Beware. But you cannot go wrong with Mr. Foster's implementation of the 42s!

I've tried most of the 42s emulators and this is the best except it REALLY needs to be updated for the larger iPhone screen height! Bryon, why don't you charge a little more and get this thing updated?

Great app, miss my 42s so this is awesome. Pretty hard to teach your kids the benefits of RPN without sharing, they won't pay for it.....

Love this app, but it bugs me that it still uses iPhone 4 screen dimensions. Please update to at least iPhone 5 dimensions.