RpnCalc - Rpn Calculator

Edward Falk

About this app

RpnCalc is the best RPN calculator on the Android Market.

It has an interface that users RPN calculators will be completely at home with, including these features:
Scientific mode
Basic (large key) mode
20 Memories
Key click (haptic feedback)
Continouous memory
16-level stack (configurable)
Front four stack elements displayed
RpnCalc has a sixteen-level stack to hold more data. The front four elements on the stack are visible at all times, making it much easier to keep track of where you are in your calculations.
"Calculator tape" records your calculations and can be shared via email, bluetooth, etc.

See http://www.efalk.org/RpnCalc/ for manual

Oh, and here's the privacy policy: RpnCalc never collects any private data of any sort. It never connects to the internet. It doesn't even run ads.

Ratings and reviews

Nice app but have one complaint. 'Landscape' rotates it so the top of the phone is on left side of the app. The phone's motion sensor, near the top of the phone, keeps getting set off as my left hand waves over it when pressing buttons on the calc. If only 'landscape' rotated 45 degrees in the OPPOSITE direction, then the left hand wont set it off. It would be better.

some of HP-41 functions are not properly supported. it does have Last-x, but when I enter a number and press "enter" 2 more times, the T register value is not "sticky"... it drops down and resets to zero on multiple actions. In all HP Rev Polish calculators, this was a VERY useful feature, since it allows unlimited accumulation of a value by repeatedly executing + (add) or rising a number to an integer power by repeatedly executing a multipy.

The calculator works fine, but a long key press does not bring up the menu on a new Galaxy S24 running android 14. It works once, then long press does nothing. If I go to settings and "force stop" the app, then re-open it, the long press will bring up the menu once more before it fails. The app needs some kind of update. Hope it gets one. For clarification, closing and then reopening the app is enough to make the menu operational again (once). Using "force stop" is not necessary.

What’s new

Fixes extraneous icon issue