RPN
Reverse Polish Notation
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
This is a calculator app using Reversed Polish Notation (RPN)
In Portrait mode, this app provides a basic calculator with the four arithmetic disciplines +, -, x, and /.
In Landscape mode, 30 extra buttons are available providing most functions found on a scientific calculator. You can do trigonometry, logarithms, roots, probability, and more.
RPN is neat because you can do fancy calculations without having to worry about parenthesis. Putting the operator after the operands allow the operator to infer which are its operands without the clarification offered by paranthesis.
The built-in help function (?) provides a short description of each function.
The settings page allows you to set the number format, number of decimals displayed, decimal separator and more.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Bugfixes:
- Fixed a bug causing suboptimal user interface when activating the "Button Shapes/Show Borders" accessibility setting.
- Fixed a bug causing low contrast on some text in dark mode.
The developer, Joachim Seland Graff, 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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Joachim Seland Graff
- Size
- 601.1 KB
- Category
- Utilities
- Compatibility
Requires iOS 15.6 or later.
- iPhone
Requires iOS 15.6 or later. - iPod touch
Requires iOS 15.6 or later. - Mac
Requires macOS 12.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Joachim Seland Graff