RPN 48 Downloads & RevenueRPN 48 · App Store
47 days old
RPN 48 is #21 in Education Paid in Brazil and charting in 2 of 30 countries we track.
Updated 9 Nov 2026 · rankings refresh through the day
DeveloperGuglielmo Pasa
CategoryEducation
Price5.99 USD
Released
Rating★ 5.0 (1)
Version0.2.4
Age rating4+
First seen by us
25 Sep 2026
25 Sep 2026✏️Description updated✏️Description updated📦Updated to version 0.2.4🆕Its developer released another app: RPN 15C📈Entered the top 100🆕Its developer released another app: RPN 12C📦Updated to version 0.2.3📈Entered the top 100
Full timeline · 35 events
- ✏️RPN 48: description updated· BR
- ✏️RPN 48: description updated· IT, US
- ✏️RPN 48: new iPad screenshots· IT
- ✏️RPN 48: new screenshots7 screenshots (was 7) · IT
- 📦RPN 48 updated to version 0.2.4• Greyscale pictures work: programs that flip the display between two images in step with the screen no longer wait forever for the display's line counter, and the display blends the images into grey as the real one does.
• The ROM list no longer gives years HP never published: revision R and revision J are the last of their series.
• Save Program… and Load Program… (the menu; on the Mac, the File menu): a variable's program to a text file and back, in HP's transfer form (%%HP: T(3)A(R)F(.);), the calculator compiling it itself.… more - 🆕RPN 48: its developer released another app: RPN 15C
- ✏️RPN 48: new iPad screenshots· US
- ✏️RPN 48: new screenshots7 screenshots (was 7) · US
- 📈RPN 48 entered the top 100Top Paid · Education · US
- ✏️RPN 48: new iPad screenshots· BR
- ✏️RPN 48: new screenshots7 screenshots (was 7) · BR
- 🆕RPN 48: its developer released another app: RPN 12C
- 🆕RPN 48: its developer released another app: RPN 49G
- ✏️RPN 48: new iPad screenshots· FR, DE
- ✏️RPN 48: new screenshots7 screenshots (was 7) · FR, DE
- 📦RPN 48 updated to version 0.2.3• Mac: the calculator's size changes in steady steps, with View ▸ Zoom In (⌘+), Zoom Out (⌘−) and Actual Size (⌘0), a pinch on the trackpad, or the green button. A window resized by a corner settles on the nearest step. Fixed: after a resize the calculator could be cut off on the right and at the bottom.
• Flat Display, in the menu: the screen in one even colour, without the shading of the photo.… more - ✏️RPN 48: new iPad screenshots· DE
- ✏️RPN 48: new screenshots7 screenshots (was 7) · DE
- ✏️RPN 48: new iPad screenshots· TR, FR
- ✏️RPN 48: new screenshots7 screenshots (was 7) · TR, FR
- 📦RPN 48 updated to version 0.2.2• Touches : un appui avance d’un seul pas. Sur un écran tactile, le curseur pouvait sauter des caractères, surtout dans CHARS.
• Une touche maintenue se répète pas à pas, une dizaine de fois par seconde, chaque pas à l’écran.
• Flat Display, dans le menu : l’écran d’une couleur unie, sans le dégradé de la photo.… more - ✏️RPN 48: new iPad screenshots· FR, IT
- ✏️RPN 48: new screenshots7 screenshots (was 7) · FR, IT
- 📦RPN 48: now updating weekly4 updates in 30 days, after a quiet two months
- 📈RPN 48 entered the top 100Top Paid · Education · DE
- 📦RPN 48 updated to version 0.2.1• Fixed on the Mac: on some models (Intel especially), the calculator could close at launch or when a key was clicked.
• Minor stability improvements. - 📈RPN 48 charting in a new countryTurkey
- ✏️RPN 48: new screenshots7 screenshots (was 7) · IT
- 📈RPN 48 entered the top 10Top Paid · Education · BR
- ✏️RPN 48: new screenshots7 screenshots (was 7) · BR
- 📈RPN 48 entered the top 10Top Paid · Education · FR
- 📦RPN 48 updated to version 0.2• Paste: the clipboard is typed on the calculator — programs « … », algebraics, strings, lists, lower-case letters, the comparison signs ≤ ≥ ≠ and the other characters of its keyboard. In the menu, and ⌘V on the Mac.
• The calculator keeps its real speed and its real clock: after a pause it no longer runs ahead of real time (which delayed its timers and could miss keys).… more - 🆕RPN 48 first spotted by AppInsider#37 in Top Paid · Education · Brazil
- 📦RPN 48 version 0.1No release notes
- 🆕RPN 48 released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Rating
5.0 ★
1 ratings
Measured
Best rank now
#21
Education PaidMeasured
RPN 48 on the App Store
App details
App ID
6814120753
Publisher
Guglielmo Pasa
On the store since
Sep 2026
Under a year
Minimum OS
iOS 16.0+
iPhone 8 and later
Devices
iPhone · iPad
Universal purchase
Content rating
4+
Languages
1
EN
Size
16 MB
Also listed in
Utilities
Where RPN 48's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| Brazil | EducationPaid | #21 |
 Italy | EducationPaid | #57 |
Apps near RPN 48 on the chart
Education Paid, around #21.
Ratings
App Store, worldwide.
Rating
5.0 ★
1 ratings
Measured
Ratings
1
Measured
Review momentum
ⓘ How we measure thisNew ratings a week
under 1
4-week average
Written reviews a week
under 1
US App Store
Lifetime rating
5.0★
recent stars not readable yet: new ratings are a tiny share of the total
Review momentum
57/100
faster than 61% of Education apps
Review momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
What users say about RPN 48
From recent reviews.
About RPN 48
The HP 48 is the calculator of a generation of engineers, physicists and students: the 48SX of 1990 brought RPN, RPL programming, units, symbolic algebra and graphing into one machine, the 48GX of 1993 added the equation library, the solver applications, more memory and a faster processor. Thirty years on, many still keep one on their desk — and this app puts one in your pocket.
RPN 48 is not an imitation: it emulates the calculator's hardware — the Saturn processor, the memory controllers, the 131×64 display, the keyboard, the timers — and runs HP's original ROM, so it behaves exactly as the real machine: every function, every menu, every flag, every quirk.
THE CALCULATOR
• RPN with the four-level stack (and unlimited stack depth), or algebraic entry, at your choice
• Symbolic algebra: expressions, simplification, derivatives, integrals, Taylor series, equation solving; exact rational and integer arithmetic
• Scientific calculator: complex numbers, vectors and matrices, statistics and regressions, unit conversions with dimensional analysis, base conversions (BIN/OCT/HEX), numeric solver, financial (TVM) calculations, dates and times
• Graphing: function, polar, parametric, conic, differential equation, statistics and 3D plots, with zoom and trace
• The 48G series' Equation Library with 300 equations of physics and engineering, with units
• Programmable in RPL: your programs run as on the real machine
THE APP
• Both models: the HP 48GX (ROM revisions R and P, the 48G series' 128 KB) and the HP 48SX (ROM revisions J and E), each at its own speed and with its own memory
• Your calculator's memory stays: close the app, come back later, it is exactly where you left it
• HP's manuals (Quick Start Guide, User's Guide, Advanced User's Reference) can be downloaded into the app and read next to the calculator; the app remembers your page
• Hardware keyboard support on iPad and iPhone
• Works fully offline, no account, no ads, no tracking
ABOUT THE ROM
The app contains no HP software. On first launch you pick a model and its ROM image is downloaded from GitHub, where the app keeps a copy of the package published on hpcalc.org, the community archive where HP allowed the HP 48 ROMs to be published in 2000; the image is then kept on your device.
HP, HP 48, HP 48SX and HP 48GX are trademarks of HP Inc. This app is an independent project and is not affiliated with or endorsed by HP.
RPN 48 is not an imitation: it emulates the calculator's hardware — the Saturn processor, the memory controllers, the 131×64 display, the keyboard, the timers — and runs HP's original ROM, so it behaves exactly as the real machine: every function, every menu, every flag, every quirk.
THE CALCULATOR
• RPN with the four-level stack (and unlimited stack depth), or algebraic entry, at your choice
• Symbolic algebra: expressions, simplification, derivatives, integrals, Taylor series, equation solving; exact rational and integer arithmetic
• Scientific calculator: complex numbers, vectors and matrices, statistics and regressions, unit conversions with dimensional analysis, base conversions (BIN/OCT/HEX), numeric solver, financial (TVM) calculations, dates and times
• Graphing: function, polar, parametric, conic, differential equation, statistics and 3D plots, with zoom and trace
• The 48G series' Equation Library with 300 equations of physics and engineering, with units
• Programmable in RPL: your programs run as on the real machine
THE APP
• Both models: the HP 48GX (ROM revisions R and P, the 48G series' 128 KB) and the HP 48SX (ROM revisions J and E), each at its own speed and with its own memory
• Your calculator's memory stays: close the app, come back later, it is exactly where you left it
• HP's manuals (Quick Start Guide, User's Guide, Advanced User's Reference) can be downloaded into the app and read next to the calculator; the app remembers your page
• Hardware keyboard support on iPad and iPhone
• Works fully offline, no account, no ads, no tracking
ABOUT THE ROM
The app contains no HP software. On first launch you pick a model and its ROM image is downloaded from GitHub, where the app keeps a copy of the package published on hpcalc.org, the community archive where HP allowed the HP 48 ROMs to be published in 2000; the image is then kept on your device.
HP, HP 48, HP 48SX and HP 48GX are trademarks of HP Inc. This app is an independent project and is not affiliated with or endorsed by HP.
Latest updates
0.2.4
• Greyscale pictures work: programs that flip the display between two images in step with the screen no longer wait forever for the display's line counter, and the display blends the images into grey as the real one does.
• The ROM list no longer gives years HP never published: revision R and revision J are the last of their series.
• Save Program… and Load Program… (the menu; on the Mac, the File menu): a variable's program to a text file and back, in HP's transfer form (%%HP: T(3)A(R)F(.);), the calculator compiling it itself.
0.2.3
• Mac: the calculator's size changes in steady steps, with View ▸ Zoom In (⌘+), Zoom Out (⌘−) and Actual Size (⌘0), a pinch on the trackpad, or the green button. A window resized by a corner settles on the nearest step. Fixed: after a resize the calculator could be cut off on the right and at the bottom.
• Flat Display, in the menu: the screen in one even colour, without the shading of the photo.
0.2.2
• Touches : un appui avance d’un seul pas. Sur un écran tactile, le curseur pouvait sauter des caractères, surtout dans CHARS.
• Une touche maintenue se répète pas à pas, une dizaine de fois par seconde, chaque pas à l’écran.
• Flat Display, dans le menu : l’écran d’une couleur unie, sans le dégradé de la photo.
Store changes
What RPN 48 changed on its store page: name, icon, screenshots, price, size, languages, requirements.
Description updated
Description updated 
New iPad screenshots
