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What’s New Version 1.9
v1.9
-Updated Firmware to 00.109.03.03b0
-Rejig was updated to 0.27.0
-Added a Random Theme Generator
-Reorganized theme sliders
-UI improvements
-Added Long press to copy X to clipboard
-Updated Keyboard Shortcuts
-Improved Pause in programs
Description
An RPN calculator isn't just a tool for getting answers like a traditional exam calculator—it's a way of thinking. It mirrors how you naturally break problems into steps, making it more like an extension of your mind than a shortcut.
A full HP-style RPN scientific calculator — on iPhone and iPad, offline, with no ads or tracking.
47 Calculator is a programmable Reverse Polish Notation scientific calculator. Trigonometry, logarithms, statistics, probability, finance, complex numbers, base conversions, matrix operations, numerical solvers — the full 47-series instruction set, in your pocket.
Free includes the calculator, a program editor for reading and writing 47-series programs, reference documentation, and a full tutorial library — probability and statistics, finance, numerical methods, programming patterns, advanced RPN techniques.
The Pro version adds the Explorer — browse every menu, flag, mode, and operation the engine supports, searchable and cross-linked.
Works fully offline after first launch. Light and dark themes. No ads, no third-party analytics, no tracking, no account required.
In-App Purchases US pricing
One-Time Purchases
Pro Pack$4.99
Capabilities
In-App Purchases
Accessibility
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Version history 10 versions
Build 886755210v1.92026-06-10 17:00:42
v1.9
-Updated Firmware to 00.109.03.03b0
-Rejig was updated to 0.27.0
-Added a Random Theme Generator
-Reorganized theme sliders
-UI improvements
-Added Long press to copy X to clipboard
-Updated Keyboard Shortcuts
-Improved Pause in programs
Build 886179140v1.82026-05-27 16:49:52
v1.8
-Added Label Mode in Themes to hide unfocused labels
-Updated sound haptic feedback
-Alphabet letters highlight for text input modes
-Added a Command search to the Explorer tab
-Shortcut keys will recognize the keyboard in Alpha Search Mode
-Changed the color sliders to collapse for more space
-Added Button Text, Color, Size, & Brightness sliders
Build 886061716v1.72026-05-24 19:26:17
v 1.7
-Added Buzz, Play, and Volume support
-Added R47 Faceplate theme
-Added Matrix size guard
-Updated Rejig to 0.25.3
-Added a Sound tutorial
-Update haptic feedback response
Build 885941929v1.62026-05-21 17:20:48
v 1.6
-Added CHARS items to the Program Editor Reference
-Updated Rejig to 0.25.2
-Added Rejig flags to the Program Editor
-Redesigned the software layer between the LCD and firmware
-Added an iOS file helper to XPORTP
-Fixed MacOS and iOS file filters for .p47 files
-User Interface adjustments
Build 885739117v1.52026-05-17 03:14:19
v 1.5
-Updated BST, SST, & Off Labels
-Fixed missing fonts on new flags
-Updated the clear search box button in the Tutorials Tab
-Improved load sequences of themes, labels, and layouts
-Fixed User Mode labels spacing
-Updated LCD communications
-Updated Landscape Mode behavior
-Added Rejig flags to the Program Editor
Build 885591330v1.42026-05-12 23:08:22
v 1.4
-Explorer supports switching calculator layouts
-Grid, Color, Borders, & Highlight persist on page reloads
-Updated x and y letters under square root
-Standardized Save button behavior
-Increased main key font size and button height by 6 pixels
-Changed Haptic feedback checkbox to off, low, med, high
-Removed Fill Checkbox
-Added sound option for button clicks of off, low, med, high settings
-Moved the font size buttons from the Explorer Tab to the Settings Tab
-Removed file filter when opening files
-Added a Paste Button on the Program editor
-Increased the height of the status bar on the Program Editor
Build 885448894v1.32026-05-10 05:25:47
-Fixed non-standard fonts in the Explorer Tab item descriptions
-Improved softkey menu naviation on the Explorer Tab
-Standardized Tutorial layouts with support for a Press/Display/Comment table
-Updated the Tutorial renderer to support new formats for planned tutorial updates
-Added extended descriptions on items in the Explorer Tab
-Fixed the C47/R47/DM42 Explorer icons so they change with the calculator type
-Changed the Pencil and Settings icon to support themes
-Added number values to conversion units in the Explorer
Build 885354959v1.22026-05-07 19:05:52
-Added screenshot SNAP support in Files and Exports
-Added support for Beep in Audio
-Separated Calculator and Explorer Themes
-Added Text and BG Color Sliders
-Added Print commands to Exports as TSV output
-Increased Explorer Panel width on iPad
-Added theme support for iPad background colors
-Register scrolling bugfix
Build 885223018v1.12026-05-04 17:01:03
-Expanded over 600 key and menu descriptions in the Explorer Tab
-Added entries to the Reference items on the Program Tab
-Updated the Programming Tab to Rejig 0.23.1
-Fixed the speed when executing Programs
-Fixed the Function Button long press behavior
Build 884906707v1.02026-05-02 08:06:31
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Availability 1 of 1 storefronts
| Region | Language | Price | Ratings | Avg | Version |
|---|---|---|---|---|---|
| US | en-US | Free | 19 | 5.0 | 1.9 |
Change log 14 changes · US
✎
releaseNotes updated
v1.9
-Updated Firmware to 00.109.03.03b0
-Rejig was updated to 0.27.0
-Added a Random Theme Generator
-Reorganized theme sliders
-UI improvements
-Added Long p
✎
description updated
An RPN calculator isn't just a tool for getting answers like a traditional exam calculator—it's a way of thinking. It mirrors how you naturally break problems i
✎
subtitle updated
HP Program Editor & Tutorials
✎
name updated
R47 RPN Calculator
◆
Version 1.9 released
v1.9
-Updated Firmware to 00.109.03.03b0
-Rejig was updated to 0.27.0
-Added a Random Theme Generator
-Reorganized theme sliders
-UI improvements
-Added Long press to copy X to clipboard
-Updated Keyboard Shortcuts
-Improved Pause in progr
◆
Version 1.8 released
v1.8
-Added Label Mode in Themes to hide unfocused labels
-Updated sound haptic feedback
-Alphabet letters highlight for text input modes
-Added a Command search to the Explorer tab
-Shortcut keys will recognize the keyboard in Alpha Search
◆
Version 1.7 released
v 1.7
-Added Buzz, Play, and Volume support
-Added R47 Faceplate theme
-Added Matrix size guard
-Updated Rejig to 0.25.3
-Added a Sound tutorial
-Update haptic feedback response
◆
Version 1.6 released
v 1.6
-Added CHARS items to the Program Editor Reference
-Updated Rejig to 0.25.2
-Added Rejig flags to the Program Editor
-Redesigned the software layer between the LCD and firmware
-Added an iOS file helper to XPORTP
-Fixed MacOS and iOS
◆
Version 1.5 released
v 1.5
-Updated BST, SST, & Off Labels
-Fixed missing fonts on new flags
-Updated the clear search box button in the Tutorials Tab
-Improved load sequences of themes, labels, and layouts
-Fixed User Mode labels spacing
-Updated LCD communica
◆
Version 1.4 released
v 1.4
-Explorer supports switching calculator layouts
-Grid, Color, Borders, & Highlight persist on page reloads
-Updated x and y letters under square root
-Standardized Save button behavior
-Increased main key font size and button height b
◆
Version 1.3 released
-Fixed non-standard fonts in the Explorer Tab item descriptions
-Improved softkey menu naviation on the Explorer Tab
-Standardized Tutorial layouts with support for a Press/Display/Comment table
-Updated the Tutorial renderer to support new
◆
Version 1.2 released
-Added screenshot SNAP support in Files and Exports
-Added support for Beep in Audio
-Separated Calculator and Explorer Themes
-Added Text and BG Color Sliders
-Added Print commands to Exports as TSV output
-Increased Explorer Panel width
◆
Version 1.1 released
-Expanded over 600 key and menu descriptions in the Explorer Tab
-Added entries to the Reference items on the Program Tab
-Updated the Programming Tab to Rejig 0.23.1
-Fixed the speed when executing Programs
-Fixed the Function Button long
◆
Version 1.0 released