DOWNLOAD  $10.00


    DOWNLOAD  $10.00



    A scientific calculator based on the classic HP 41.

    For a special tablet edition look for go41cxt

    Don't forget to get the manual (pdf file) at

    On Android 4.4 device, import/export directory is now /Android/data/o2s.emul.hp41cx/files/... instead of /go41cx/...
    On S5 devices, long press the right hardware button to get the menu.

    - import bug from kitkat corrected

    - state file save now modules
    - new lib#4

    - new skin
    - forth 8K module support (only in CV mode, not supported on CX)
    - lib#4 from A. Martin support
    - lcd lowercase display (roms are patched)
    - all import/export now use '/go41cx/...' directory instead of '/Download' on your sdcard (usually '/mnt/sdcard/'), export again all your files to recreate it.
    - haptic feedback added (activate it in your device).
    - short manual to explain all the behaviour (see at ).
    - new basic skin (like the first release).
    - some interface changes (new really hard reset).
    - partial card reader support (only hp67 emulation functions, no hardware, see
    v1.4.0 upgrade: change of state file format, EXPORT your raws and xmem before upgrade if possible (MEMORY LOST at start).

    Sound added, inline help (tap left of display), text overlays working again (use with 'black_o' graphics overlay or 'opt001' skin), ADV printer working (tap right of display), Config with _o.txt overlay files (tap middle of display).

    Full HP 41 CX/CV emulator:

    - Full memory and X memory.

    - Timer functionnal, but accuracy not well tested (AF is not emulated).

    - Manage states, overlays, raw prgms, xmem, ...

    - Automatic save and load of state.

    - Download modules, raws, from internet, then use 'import'.

    - Use MOD modules, RAW programs format.

    - You can put modules, raws, overlays, xmems, states in 'Download' directory of your SD card.

    - 'ON' only active on 'longtouch' to avoid mistakes.

    - Master clear supported (use 'press back' menu when calculator is off then press 'ON', then press 'back' to release it).

    - Speed greater than 1 are not patched for 'PAUSE' ...

    - Hepax support up to 4 * 8KW modules

    - Top status line for Stack, Alpha ... display (tap on it to change it).

    Avoid checking 'force gpu rendering' in developer option in android 4.x prefs, this leads to graphic problems.

    Emulator loosely based on Non-Pareil from Eric Smith, font by Luiz C. Vieira.

    Tags: go41cx , go41cx apk , go41c apk , go41c , droid48 apk , go41cx manual , go41cx v1.4.0 , go41cxt apk , hp 41 cx apk

    Users review

    from 162 reviews



    Users comments for go41cx

    Rubén Aguilar

    by Rubén Aguilar

    Nov 06, 2017  |  "Awesome"

    This is a great application! It seems I al working con my original calculator. Thank your forma this great development. Best

    Alan Klainbaum

    by Alan Klainbaum

    Feb 14, 2017  |  "Poor"

    The free version states tones are disabled. I thought the were refering to click sounds to confirm when you press a keyboard key. The pay version also does not make any sound on my Samsung Galaxy S7. This is a problem because it leades to errors entering numbers. I can not recomend this 41C emulator. The versions for Apple OS are better.

    Kevin G

    by Kevin G

    Dec 23, 2016  |  "Good"

    I originally had the free Go41C version and decided to update it for two reasons. One, I wanted to be able to enter some programs that I have written for my 41CV. Two, I wanted to be able to use the Math module for solving simultaneous equations. I was able to enter in the programs that I have previously written. This app works exactly like the original calculator in that respect. However, after hours of trying to install the Math Module, I have yet to succeed. I have tried to follow the instructions given online, but there is no import/export function that I can figure out. I have copied the MATH.MOD file to every directory associated with the app, both internally and on the SD card, but the app cannot find it. I sent an email to the developer a few days ago, but have not heard back. I had a similar app on my old iPhone, and it was beautiful. All modules worked, and I could program. I will happily upgrade this to a 5 star rating when and if this bug is corrected.

    Don Carr

    by Don Carr

    Dec 13, 2016  |  "Awesome"

    Use it all the time

    Joseph J. Schwartz

    by Joseph J. Schwartz

    Dec 09, 2016  |  "Awesome"

    How do I load, save and print programs that I have written?

    Bill Zimmerly

    by Bill Zimmerly

    Aug 05, 2014  |  "Awesome"

    I've been a HP41C user since 1979 and this is by far the best emulator of it. It runs great on my Samsung Galaxy Note 2. (Running Android 4.1.2)