iPhone 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 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 1.1.5

- Updated with latest iOS build.

Ratings and Reviews

PMattes ,


This app is junk. It overflows when you enter a hexadecimal number with more than five digits, and you cannot see the numbers as you enter them - your finger blocks the display. Don't waste your money.

Agent_99 ,


Ahhhhh...getting back to basics. Well done DMorneault! Are you French???

Jeff Manislaw ,

Very nice calculator app.

This app harkens me back to the first HP-10C calculator I ever owned. Extremely well implemented RPN style calculator.


David Morneault
521.2 KB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.



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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