RPN 50gHP 49G calculator emulator for iPhone, iPad and MacRPN 49G — HP's original ROM, on an emulated Saturn.
The HP 49G of 1999 took the HP 48 further: a computer algebra system built in, a larger display, an equation writer, 2 MB of flash memory and RPN or algebraic entry. RPN 49G emulates the calculator's hardware and runs Hewlett-Packard's original ROM: every function, every menu, every flag — a true emulator, not a simulator with a look-alike keyboard.
What you get
The real HP 49G
Not a look-alike: the emulated Saturn processor, memory controllers, flash memory and its banks, the 131×64 display, keyboard and timers run HP's ROM 2.10, so the calculator behaves exactly as the one on your desk.
Computer algebra
Exact arithmetic, expansion and factorisation, derivatives, integrals, limits and series, equations and differential equations, matrices and linear algebra, with a step-by-step mode.
RPN or algebraic
RPN with an unlimited stack, or algebraic entry, at your choice; the Equation Writer and the matrix writer show what you type as it is written on paper.
Graphing and programming
Function, polar, parametric, differential-equation, statistics and 3D plots; the numeric solver, units, complex numbers, base conversions; programs in User RPL.
Memory that stays
Close the app, come back later: the calculator is exactly where you left it, its flash memory and port 2 included.
Manuals in the app
HP's Pocket Guide, User's Manual (English, Spanish, Portuguese, German) and Advanced User's Guide can be downloaded and read next to the calculator; the app remembers your page.
Hardware keyboard
Digits, operators, Return, arrows, F1–F6 and the shifts, on iPad, iPhone and Mac.
Offline, private
No account, no ads, no tracking, no data collection. Works fully offline once the ROM is on the device.
In use
Why an emulator of the HP 49G?
The HP 49G (1999) was the first HP calculator with a computer algebra system built into its ROM, and the bridge between the HP 48 and the HP 49g+ and HP 50g: the same Saturn lineage, a larger display, flash memory instead of expansion cards, and an algebraic mode beside RPN. Emulating its hardware and running HP's own ROM is the only way to get the genuine calculator, with all its functions and quirks: RPN 49G does exactly that on iPhone, iPad and Mac. How these apps compare with Emu48 and x49gp is set out here.
About the ROM
New to the machine? HP's Pocket Guide, the User's Manual and the Advanced User's Guide are free PDFs on literature.hpcalc.org, and the app downloads them for you.
The app contains no HP software. On first launch HP's ROM package (ROM 2.10, HP's last for the 49G, 2.4 MB) is downloaded from hpcalc.org, the community archive where HP's calculator ROMs are published — exactly as you would with a browser — and checked against its known fingerprint. The image is then kept on your device. The Saturn core was written from HP's Saturn documentation.