go33c

I have had an HP33E since 1979 - still working. The HP33C is the same calculator but with continuous memory. This App is very accurate even down to the self test except that there should be a minus sign before the first 8. The keys could be more ivory coloured. No adds, no excessive permissions. Free. It is doesn't get better than this. Brilliant. I use it all the time! I notice on Android 7 if you close the app with the arrow key, next time you open haptic feedback stops working and you have to force close. If closed with the home key it's ok.

An almost perfect and visually excellent emulator of the HP-33C. It is my daily go-to calculator. There are three items that keep it from being perfect, in my mind. The first is that I would like to adjust the haptic response from within the app. The second issue is more significant. Tapping on the "display" to enter programming mode seems like a good idea, but every time I pull-down the system menus, I end up in programming mode - and usually trash my program as a consequence. Something slightly harder to toggle (maybe a long press) would be fantastic. Finally, being able to import/export programs would be awesome! Still, this is absolutely the best emulator out there, and the only plausible competition for Olivier is HP themselves (for the 12C and 15C).

I'm actually a fan of the HP-25 but this is close enough. Edit: Had to update my comment and increase to 5 stars. The keystroke detection problem was solved by running at 2x or faster. Simulation and appearance is perfect. Couldn't be better. Why is it that when you search Play Store for HP calc, lots of calculators show up but not this one??? This one is the best. On my Note 4 it almost feels like an HP-25. Awesome.

A solid feature set and a great emulation.

Perfect. Nice clean representation. Great clear display, well scaled to fit button and font sizes. Perfect on Lenovo tab.

Programming is non functional on Samsung Note3.

Hi thanks I have forever been a HP user. It takes me back to my varsity time. Still doing training and will use. Nothing better than RPN. Thanks

Keyboard very unresponsive

I'm actually a fan of the HP-25 but this is close enough. My only negative comment is the same as Ivan's. Keypresses sometimes fail to register. Highly recommended!

I love the graphics and functionality. Only problem is that sometimes key presses are not registered. Is there an option for vibration?

but as other people say the white keys are too bright. Maybe a tone down. LED background - I will prefer it black. === Still 5 stars.===

I cannot remember any differences from the original. And, better than that, I really needed an RPN calculator.

Works perfectly, beautifully designed, and brought me back by 35 years, to when I was a kid learning my first programming language...

My only gripe is the brightness of the white keys. I think a 2-tone ivory scheme would be easier on the eyes. Works great on Samsung Note.

Great Calculator. I had one at university. But the white keys are a bit bright. maybe a tone down, eg ivory would be better. Also maybe the LED display could be made more like the actual calcualtor, eg. with a small break in the middle of the letters.

Beautiful!! Works perfectly, beautifully designed, and brought me back by 35 years, to when I was a kid learning my first programming language...

Perfect! I cannot remember any differences from the original. And, better than that, I really needed an RPN calculator.

Perfect ! but as other people say the white keys are too bright. Maybe a tone down. LED background - I will prefer it black. === Still 5 stars.===

Bright white keys Great Calculator. I had one at university. But the white keys are a bit bright. maybe a tone down, eg ivory would be better. Also maybe the LED display could be made more like the actual calcualtor, eg. with a small break in the middle of the letters.

Excellent HP-33C emulation My only gripe is the brightness of the white keys. I think a 2-tone ivory scheme would be easier on the eyes. Works great on Samsung Note.

Unresponsive Keyboard very unresponsive