I don't know if this has been suggested before but I suggest here that the "second function" (f-key) be also activated by a longer touch. An excellent calculator this is!
Best RPN calculator Excellent app - does what I need and no ads! Developer is super responsive too. I had a problem on a particular phone, and he had an update with a fix posted the next day. Maybe it was a happy coincidence, but I'm a fan.
I love this RPN calc I use this RPN calc frequently. I have an HP15C from college days that I used to use all the time, but it's much more convenient having it on my phone. This app works well.
If you love HP calculators you will be very happy with this one. Been using HPs since my first HP35.
Long time RPN user loves this!! Simple yet comprehensive.
A couple of tips, based on others' questions here: enter a negative number with the CHS (CHange Sign) key. And change the number of decimal places with [f], then FIX, SCI, or ENG to determine how you want numbers displayed. the calculator will then ask how many decimal places you want. If I have a beef, it's that the designer doesn't use the space available on buttons to make the numbers a little larger. Old eyes, you know.
With Version 2.29, touching the numeric display area will bring up the menu. Long touches bring up a copy/paste menu.