go41c

Olivier De Smet

About this app

A scientific calculator based on the classic HP 41C.

Full HP 41C emulator:

- 64 memory registers.
- Automatic save and load of state.
- No modules support.
- '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).
- No sound

Avoid checking 'force gpu rendering' in developer option in android 4.x prefs, this leads to graphic problems.
On S5 devices, long press the right hardware button to get the menu.

To have more features, get go41cx (sound, modules, printer, ...) for tablet see go41cxt (wand, debug ...)

Online manual at http://www.greendyk.nl/hp41c-manual/
Pdf manual at http://www.cosc.canterbury.ac.nz/greg.ewing/X-41/HP41C.pdf

More infos at Warren Furlow's site http://www.hp41.org/Intro.cfm

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

Ratings and reviews

Brilliant app. The emulation is spectacular. The issue I have is, it extends all the way to the bottom of the screen and overrides the navigation (touch) buttons. This can be over come by tapping on the LCD screen which enables access to the navigation keys. Would be easier if the screen did not extend tight to the bottom. Looking at the images provided, this could be a issue with the rendition on larger screens... Update: purchased app. This too runs into screen size issue with Pixel 6 pro

I have used & loved this app with every phone I have had (which totals 6) & it has worked just as my 41c I bought when I was in college. Lately when I pressed a key it didn't show in the display making the app totally useless. I wrote the developer with no response. I was about to uninstall the app but started reading posted reviews. In one a user mentioned that the on/off button was a "long press " which had never worked before. It was always "ON". I tried the long press and it works again!!

I tried this app on the Samsung S7 and the screen was just too cramped and I did not like it. I have recently upgraded my phone to the larger screen S8 and it is much better and I use it daily. One reason the early hp calculators made such a huge impact was the tactical feed back of the keyboards. This feature is hugely missed. A tactical feed back is crucial on any professional grade tool and this tool is certainly Pro grade. Thanks for such a great product for only $10 bucks.

What's new

Support for Android 9 notch (launch the app, quit the app, 'force quit' the app, re-launch the app)