RPN Anywhere 4+

Bring RPN Calculator Anywhere

Hiroki Kawakami

    • 4.0 • 1 Rating
    • $0.99


This is a simple RPN Calculator which can use on macOS.

*** Important! ***
This calculator uses reverse Polish notation for input, and the operation method is different from a normal calculator using infix notation.
If you don't know about RPN Calculator, you should learn about that before you download this app.

How to use
> Green up-arrow is ENTER button
> Stack size can be changed at Preferences.
> You can use multi calculators at same time. Please create new calculator from File Menu.
> Programs trace key operations registered in Preferences.
> You can type numbers and operators with keyboard and numeric pad.
> To use programs and scientific operators, please change to scientific mode from View menu.
> Can change number format from Preferences or View menu.

What’s New

Version 5.1

Support customizing number format.

Ratings and Reviews

4.0 out of 5
1 Rating

1 Rating

lethall55 ,

Best practical programmable RPN iOS calculator

Though I am eager to give this app 5 stars, I bought this for use on my Series5 watch but find that there is a bug with WatchOS 7.1 which won't let me swipe to get back to main from the function screens. Unfortunately, the app support page is not in English, so I don't know if there's a workaround.

So why did I give it 4 stars even though it has a debilitating bug? It is unapologetically RPN. The layout and functionality isn't perfect; but it is the most practical design I have seen for writing useful scientific/engineering programs on an iOS device. The layout and functionality on an iPad is stellar.

I will definitely keep this app hoping that the watch bug gets fixed. It is very much worth it's price.

UnclBuck ,

Great RPN Calculator!

If you're looking for a simple RPN calc that features keyboard input that makes sense (and/of is customizable) compared to the default calculator (in RPN mode) then get this calc.
The only things I wish it had are a few more GUI keys. An EE key in "basic" mode would be nice, and more stack control keys (Roll up/down, Drop) in both modes for when you want to be lazy and only use the mouse. The "scientific" mode already features an EE key and thanks to the programming function I added the stack control keys as programs. Programs appear as keys below the display starting at the left, I added a couple blank programs with spaces for titles to move my stack control keys above the numeric keys. It's almost perfect!

brentwalker ,

Great app if you prefer R.P.N. But…

Have been using this app for several years and it is my go to calculator. But one thing is missing. Can you please add a number storage for number recall? Like a memory 1 and Memory 2 button. The stack is great not often I want to perform several different operations on the same number.

App Privacy

The developer, Hiroki Kawakami, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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