Apps in this category may contain mild or occasional cartoon, fantasy or real-life violence, as well as occasional or mild adult, sexually suggestive or horrifying content and may not be suitable for children under 9 years of age.

12+

Apps in this category may contain occasional mild indecent language, frequent or intense cartoon or real-life violence, minor or occasional adult or sexually suggestive material, and simulated gambling, and may be for children under 12 years of age.

17+

You must be at least 17 years old to access this App.

Apps in this category may contain frequent and intense offensive language; Frequent and intense cartoon, fantasy or realistic violence: frequent and intense adult, scary and sexually suggestive subjects: as well as sexual content, nudity, tobacco, alcohol and drugs, may not be suitable for children under 17 years of age.

RPN Calculator 48 Screenshots

iPhone

About RPN Calculator 48

RPN Calculator 48 is a polished RPN replacement for Apple's calculator app:

- Same scientific functionality as Apple's calculator app*
- Use swipe gestures to undo and redo operations!
- Starts quickly
- Large buttons
- Easy-to-read display
- 100 entry stack
- 6 memory buttons (A-F)
- 50+ levels of undo/redo
- Saves state on exit

The ergonomics (screen and keyboard layout) of RPN Calculator 48 were inspired by HP's outstanding 48-series calculator.

RPN Calculator 48 is made by the developer of tChess (the critically acclaimed iPhone chess game) and Learn Chess (the Apple Staff Favorite e-book).

* This app is not an HP 48 emulator.

What's New in the Latest Version 1.0.7

Last updated on Dec 11, 2019

Old Versions

- The "LOGx" button was incorrectly labeled "LOGy". Fixed.

Version History

1.0.7

Dec 11, 2019

- The "LOGx" button was incorrectly labeled "LOGy". Fixed.

1.0.6

Nov 27, 2019

- Added support for all current iPhone screen sizes and shapes
- Updated the keyboard sounds to match the current iOS sounds
- Now you can adjust the sound volume with the standard volume up/down buttons instead of a slider in the settings menu
- Added scientific and engineering notation
- Improved fixed notation: if a number is too big or too small to display, it's automatically displayed using scientific notation

1.0.5

Oct 1, 2015

- Native support for the iPhone 6 and 6 Plus screen resolutions
- Fixes an incompatibility with iOS 9

1.0.4

Dec 12, 2013

- Updated for iOS 7
- New "flat" icon to match iOS 7's design language

1.0.3

Oct 9, 2012

- Added support for the iPhone 5's new screen size
- Added copy and paste functions (via the "2nd" menu)

(Please note that this version requires iOS 4.3 or newer.)

1.0.2

Dec 7, 2011

- Added a slider to control the volume of the keyboard sound effect
- Fixed a graphics incompatibility with iOS 5.1

1.0.1

Sep 26, 2010

- High-resolution graphics for the Retina Display
- Commas
- "Fixed" notation
- Adjustable number of significant digits
- Setting to use commas for decimal points

1.0.0

Oct 30, 2009

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