
Calccis
A RPN calculator
About
This utility app offers advanced calculations using reverse Polish notation. It supports a wide range of functions including trigonometry, logarithms, and matrix operations for real, fractional, and complex numbers. An undo stack allows for up to 100 operations to be reversed.
What's New in Calccis
1.1.1
December 15, 2025
Some minor bug fixes. Lots of internal improvements and refactoring to support further development.
FAQ
What is Calccis?
Calccis is a free utility app that functions as a reverse Polish notation (RPN) calculator. It supports a wide array of mathematical operations including basic arithmetic, trigonometry, logarithms, exponents, and matrix calculations.
What types of numbers does Calccis support?
Calccis supports calculations with real, fractional, and complex numbers. This allows for a broad range of mathematical problems to be solved within the app.
Can I undo mistakes in Calccis?
Yes, Calccis features an undo stack that allows you to undo and redo up to 100 of your latest operations. This provides flexibility and error correction during calculations.
Does Calccis support trigonometric functions in both degrees and radians?
Yes, Calccis supports trigonometric functions and allows you to use both degrees and radians for your calculations. This caters to different user preferences and requirements.
What devices is Calccis available on?
Calccis is available for iPhone and iPad devices. It is designed to run on Apple's mobile operating systems.
How often is Calccis updated?
The latest version of Calccis is 1.1.1, which was last updated on December 15, 2025. The app was initially released on April 21, 2023.
What is the age rating for Calccis?
Calccis has an age rating of 4+. This indicates it is suitable for users of all ages, with no mature content.
Does Calccis have ads?
No, Calccis does not contain advertisements. It is a completely ad-free application.




