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Version
0.2
Size
10.72 Mb
Updated
2 weeks ago
Released
18 Sep 2026
Description
The HP 50g is the last and most powerful of a legendary line: HP 48S, 48G, 49G, 49g+ and finally the 50g — a quarter century of RPN and RPL calculators that engineers, physicists and mathematicians never really let go of. Discontinued in 2015, it remains the reference, and many consider it the best calculator ever made.
RPN 50g brings that machine to your iPhone and iPad — not an imitation, the real thing. The app emulates the calculator's hardware (its 75 MHz ARM processor, 512 KB of RAM, 2 MB of flash, the 131×80 display, the keyboard and the SD card slot) and runs HP's original firmware, so it behaves exactly as the calculator on your desk: every function, every mode, every flag, every quirk, key click included.
THE CALCULATOR
• An advanced computer algebra system: exact rational and arbitrary-precision integer arithmetic, symbolic simplification, factoring, polynomials, derivatives, integrals, limits, Taylor series, equation and system solving, linear algebra
• An advanced scientific calculator: complex numbers, vectors and matrices, statistics and regressions, unit conversions with dimensional analysis, base conversions (BIN/OCT/HEX) and bit operations, numeric solver, financial (TVM) calculations, date and time arithmetic
• Graphing: 2D function, polar, parametric, conic, slope field, differential equations, statistics and 3D wireframe/surface plots, with zoom, trace and analysis
• The Equation Library with over 300 equations of physics and engineering, with units
• RPN with the four-level or unlimited stack, or algebraic entry with the equation writer, at your choice
• Programmable in RPL (UserRPL and SysRPL): your programs and libraries run as on the real machine
THE APP
• Firmware versions 2.15 (2009, with the 2 MB fix), 2.10 and 2.09 — switch between them, each keeps its own memory
• Your calculator's memory stays: close the app, come back later, it is exactly where you left it
• SD card: put files in the app's folder in Files and they appear on the calculator's card; what the calculator writes to the card lands in Files. Install libraries as on the real machine
• HP's manuals (User's Guide, Advanced User's Reference…) can be downloaded into the app and read next to the calculator; the app remembers your page
• Paste: type text from the clipboard onto the calculator
• Hardware keyboard support on iPad and iPhone
• The beeper, so BEEP and key clicks sound like the calculator
• Works fully offline, no account, no ads, no tracking
ABOUT THE FIRMWARE
The app contains no HP software. On first launch you pick a firmware version and it is downloaded from hpcalc.org, the community archive that has hosted HP's own update packages for decades, exactly as you would with a browser; the image is then kept on your device.
HP, HP 48, HP 49g+ and HP 50g are trademarks of HP Inc. This app is an independent project and is not affiliated with or endorsed by HP.
Estimates
Availability
Devices
iPhone5s
iPadAir
iPadAirCellular
iPadMiniRetina
iPadMiniRetinaCellular
iPhone6
iPhone6Plus
iPadAir2
iPadAir2Cellular
iPadMini3
iPadMini3Cellular
iPodTouchSixthGen
iPhone6s
iPhone6sPlus
iPadMini4
iPadMini4Cellular
iPadPro
iPadProCellular
iPadPro97
iPadPro97Cellular
iPhoneSE
iPhone7
iPhone7Plus
iPad611
iPad612
iPad71
iPad72
iPad73
iPad74
iPhone8
iPhone8Plus
iPhoneX
iPad75
iPad76
iPhoneXS
iPhoneXSMax
iPhoneXR
iPad812
iPad834
iPad856
iPad878
iPadMini5
iPadMini5Cellular
iPadAir3
iPadAir3Cellular
iPodTouchSeventhGen
iPhone11
iPhone11Pro
iPadSeventhGen
iPadSeventhGenCellular
iPhone11ProMax
iPhoneSESecondGen
iPadProSecondGen
iPadProSecondGenCellular
iPadProFourthGen
iPadProFourthGenCellular
iPhone12Mini
iPhone12
iPhone12Pro
iPhone12ProMax
iPadAir4
iPadAir4Cellular
iPadEighthGen
iPadEighthGenCellular
iPadProThirdGen
iPadProThirdGenCellular
iPadProFifthGen
iPadProFifthGenCellular
iPhone13Pro
iPhone13ProMax
iPhone13Mini
iPhone13
iPadMiniSixthGen
iPadMiniSixthGenCellular
iPadNinthGen
iPadNinthGenCellular
iPhoneSEThirdGen
iPadAirFifthGen
iPadAirFifthGenCellular
iPhone14
iPhone14Plus
iPhone14Pro
iPhone14ProMax
iPadTenthGen
iPadTenthGenCellular
iPadPro11FourthGen
iPadPro11FourthGenCellular
iPadProSixthGen
iPadProSixthGenCellular
Pricing by country
| Country | Price |
|---|---|
| Canada | 7.99 CAD |
| China | 38 CNY |
| France | 6.99 EUR |
| Germany | 6.99 EUR |
| Italy | 6.99 EUR |
| Netherlands | 6.99 EUR |
| Portugal | 6.99 EUR |
| Spain | 6.99 EUR |
| UK | 5.99 GBP |
| India | 599 INR |
| Japan | 1000 JPY |
| Korea, Republic Of | 9900 KRW |
| Poland | 29.99 PLN |
| Russia | 499 RUB |
| Turkey | 299.99 TRY |
| USA | 5.99 USD |
| Ukraine | 6.99 USD |
