iPad Screenshots


Do you want to see all of the numbers that you just entered in the calculator? Do you want to work faster with less keystrokes? Well you can do both with the Eng Calc, it is a reverse polish notation calculator(RPN) with an eight line scrollable stack.

It keeps track of what calculations you have made in the history log. You can even email it if needed.

It has all the basic math functions as well as number base conversion for decimal, hexadecimal, octal, and binary. It has an eight line stack to display multiple numbers. It has the ability to swap the last two numbers on the stack. It can be in either degrees or radians mode. There are buttons for both the number pi (3.1415) and e (2.7182) located on the application. There is also an option to display the numbers in a full text wrap form instead of a scientific display for large numbers.

The application has the following functions -

- addition
- subtraction
- multiplication
- natural log / e^x
- log / 10^x
- tangent / inverse tangent
- cosine / inverse cosine
- sine / inverse sine
- inverse of a number / factorial
- square root
- y^x
- number base conversion between decimal, hexadecimal, octal, and binary

What’s New

Version 2.1.5

- Optimizations for new iOS

Ratings and Reviews

EricTaIjon ,

Solid RPN Calc

Good RPN calc. Memory and other func would be appreciated in future updates.

kq5d ,

Very good app

I love having a RPN calculator, having used an HP45 calculator through college physics and chemistry! The app is missing two important capabilities, however. A "stack roll down" and a "memory store/recall" would both be extremely useful. (The HP calculators let you store values in locations 0-9; I often used more than one storage location.)

pebble14 ,

Stay away

This appears to show a tape with the total at the bottom. Beware not so. I wanted a tape calc that would let me see the numbers I had added . Can't do it with this. After you add the numbers they disappear and just the total shows. Very very disappointed.
For a serious scientific use this might be fine but I wanted the tape feature.


David Morneault
716.8 KB

Requires iOS 8.0 or later. Compatible with iPad.



Age Rating
Rated 4+
© 2010 David Morneault


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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