I installed it mostly because it is very small (does not even requires a ROM), so I have something with RPN in case I deinstall the others for space reasons or whatever. (Not really an emulator, but anyway.) Today I also found Free42 ( ), which is not an emulator, but a reimplementation of the HP-42S. : release 3.0.13 Fixed handling of invalid number keys in BINM. : release 3.0.13a (iOS and MacOS) Fixed skin rendering for iOS 16 and MacOS 13. Special cases for pure real and pure imaginary in SQRT. This was broken by localized copy & paste. The only thing I felt was lacking was some of the menu functions weren't clearly explained, or else were explained in so many different areas that it was a bit hard to find what some of the menu. The examples are clear and the index along with the list of functions is really nice. m48 has a bigger brother which is m48+ ( ), costing $10.99, so I didn't try it, which has a bigger list of features, including saving and loading files/libraries (which m48 doesn't), emulation also of the HP49 and HP49+, and even seems to be able to run the famed Metakernel when emulating the HP48GX. : release 3.0.14 Fixed (re,im) complex pasting. Excellent manual for one of the best calculators I've ever seen. ![]() In this skin the buttons are drawn (not a picture) and very clear. The recommended skin has a simple mode (bigger buttons, basic operations) and a full mode. M48 is very good (based on Emu48), also emulates the HP48GX, and it supports skins (possibly same as Emu48, can't tell). Can't save/load files from its interface. Apart from the display, the interface is merely a picture of an HP48GX, a bit blurred etc. I48, based on x48 (like Droid48), is small and a bit limited. On iOS, I've briefly used (and am also new to the HP 50G itself) i48 ( ) and m48 ( ). I haven't used it much but it is by the same author as HC-16C. I tested it using my "Approximate e (2.718.) to 400 decimal places" HP-16C program and it worked great. It allows reading whole-calculator backups or individual objects on your Android device, with a better and deeper (more information) interface than the actual calculator. I haven't installed this one, but it led to Droid48sx. ![]() It won't beep, but does everything else I've tried the same as my real HP-48SX. Free42 is a re-implementation of the HP-42S calculator and the HP-82240 printer. My favorite, based on Droid48 (below) but with simulated memory expansion cards. I'd be interested in other Android/iOS *emulators* that you have actually used and endorse as being worth looking at. These are *emulators* that run the actual calculator ROM code to agree exactly with the real calculator, not *simulators* that look like HP calculators but use math libraries that might give different answers than the real calculator. I was pleased to find and install the following calculator emulators on my Android smartphone and tablet.
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