iPhone Screenshots

What’s New

Version 2.7.0

Bug fixes and updates to latest iOS.

Ratings and Reviews

5.0 out of 5
3 Ratings

3 Ratings

Swanflyer ,

Clever and useful

One of my favorite RPN calculators. Good looks, simple display basically shows X-register, but entire contents of stack and memory are easily accessible. Easy to program, with comprehensive instructions built in. Has a relatively light memory footprint, good for devices that are short on memory. Keyboard is a little disconcerting at first because it doesn't appear to have an enter key, but it's there - it's just labeled X with an up-arrow next to it. A little different from traditional RPN calculators but fun to use and all the same functionality is there.

Swe1001 ,

Interesting reproduction of original

I bought this app and own several real MK-61 calculators and an MK-52. This is a very good reproduction, albeit in English. Some things that I notice right away are that the red Clear button on my real MK-61 is Cx, which clears all the way F-C on this app behaves. Also the addition of Bin Hex and Dec features on this app. I wonder if there was a version of the original calculator that had these features (which makes the app a little nicer to use). Anyway this is a very cool app. Thanks!

SamLazy ,

The best RPN calculator!

Thank you! If you make MK-52 I'll buy without hesitations!


Alexander Skobelev
5.8 MB

Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© 2015-2019 Aleksandr Skobelev


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