RPN calculator

Have used RPN for 40 years. Have looked at many Android RPN calcs and settled on this one primarily because of the great stack/history view. Would give you five stars if it had a Roll button to scroll the stack. Would also like slightly larger/bolder font on the buttons. Not updated since 2013, really? Too bad.

I am so thankful this app exists. There are too few people left in the world who appreciate the elegance and efficiency of rpn! This app creates a possibility to keep it alive.

I have loaded this on every phone I have ever had.

Nice, simple calculator for those of us who like RPN.

I love it, it's simple, almost perfect. Good job!

Solid basic calculator. No permissions requires. One 4 stars + 1 star bonus for price.

Love it! Just what I needed for a quick Calc.

This is just such a nice straightforward simple everyday calculator!

Perhaps my only suggestion is to change the audio feedback to a soft click which can optionally be turned off (like how Free42 sounds).

Installed it, loved it. Read on your web site about why RPN and why a simple calculator and I can just say "me too!". I used to have an HP48 emulator installed, which I loved until I hit the wrong (small) key, or the emulator itself hung (specially when this happened in front of a non-initiated friend who wondered what the hell I was doing with such a calculator). If only you could add two things to aim for "6 stars". I wish I could navigate up/down the stack, not just swap/drop (Maybe just tapping a line on the stack could copy it to the bottom). And I'm also not crazy about the icon; I think it does not fit well with the dark, simple style of the app. But then again, taste is subjective.

Did I miss something? Where are the trig functions?

I love the design! Very simple calculator almost perfect at what it does. Only thing: PLEASE move the enter button to the right side.

Does all the things I need.

I used fancy HP rpn scientific calculators in school and work back in the day, and find RPN very intuitive. These days I only ever do basic arithmetic and this is the perfect simple rpn calculator for that.

Great for running quick numbers. I love the large keys and uncluttered screen.

Awesome! Finally I don't have to switch between work calc brain and cell phone calc brain.

Just like my old HP RPM CALC!. Great addition to my android phone.

I like this calculator but I deleted it because of it's annoying clickity-click; it clicks multiple times with every entry!

Great, simple RPN calculator. Just what I needed.

Simple, useful. Great app.

Simple but good app... perfect for daily usage.

Clean simple perfect with a real stack to work from.

Useless

RPN calculator with huge buttons, easy to use with one thumb. Four register lines visible. No scientific functions.

Excellent quick calculator and RPN remains the warp drive for embedded calcs. Rock solid operation on Droid.

Nice simple RPN calc. Only wish is that there was a swap button on the main set of keys. Not sure where it would go though...

Once you've used rpn you can never go back. Thanks for the wonderful large buttons in lieu of functions that are never used. Bravo

Nice. Simple layout. Big buttons. For basic rpn math. No permissions needed. "Thanks" to the author.

Cannot take square roots.

Works good on Sidekick4G

Now , fits well on small screen X10 mini. Still ok after 1.6 update

It took me a long time to find a nice one. Well done.

The square root button is not needed (it's just a matter of using 1/x and x^n)...you could replace with "%" which is really the only missing function! Please set the color to be theme independent or give us an option to choose. Great app! Thanks!

"No frills" might sound like a criticism, but it's not. If all you want is a simple, easy to use RPN calculator with basic features and an uncluttered interface then this is the app for you. I love it.

could you add 'DUP' to copy the top most stack? I know I can use copy and paste yet I think DUP is faster. Anyway, great app :-)

The square root button is not needed (it's just a matter of using 1/x and x^n)...you could replace with "%" which is really the only missing function! Thanks!

Fast startup, enough features. RPN, my way.

This is high quality! If you're looking for an rpn calculator this is the best choice!

Good app for rpn calculations.

Nice for those that want an RPN calculator.