The best scientific RPN calculator on iOS
I have bought about five iOS HP simulators.
This seems the best - hi res plotting, as well as symbolic algebra and programming. Though its early days so I don’t know yet if its buggy. It looks like a serious project, I wish them the best, and I’ll upgrade to the paid version if it keeps up the quality and eye for detail I’ve seen so far.
This seems the best - hi res plotting, as well as symbolic algebra and programming. Though its early days so I don’t know yet if its buggy. It looks like a serious project, I wish them the best, and I’ll upgrade to the paid version if it keeps up the quality and eye for detail I’ve seen so far.
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Lots of features!
I can't believe how good this is!
This might make me buy a Swiss micros. I'm using this for my homework.
This might make me buy a Swiss micros. I'm using this for my homework.
Impressive
I want to correct my review made one year ago. The bug has been quickly corrected, and the calculator is the most powerful and perfectly crafted tool I've ever used. Merci Christophe!
Nice but too cluttered looking
I have pretty much every HP emulation that has shown up on the App Store and I still have numerous real ones including a 15, a 16, a 34, a 48, a 67 and a 97 and two from Swiss Micro including their 42. My introduction to computing was the 25C some fifty years ago.
While this new 40 has some incredible functionality, cosmetically it looks far too cluttered. Maybe it’s the wrong fonts, or the fonts are too big and though it’s clearly very powerful, it loses the HP realism, which frankly is a big reason to collect them.
I would love to see an update that addresses the cosmetics.
While this new 40 has some incredible functionality, cosmetically it looks far too cluttered. Maybe it’s the wrong fonts, or the fonts are too big and though it’s clearly very powerful, it loses the HP realism, which frankly is a big reason to collect them.
I would love to see an update that addresses the cosmetics.
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Exciting app
I really like how this calculator app is architected and where DB48X is going.
Biggest annoyance for me is that the UI is a bit “squished” on my Phone mini
Biggest annoyance for me is that the UI is a bit “squished” on my Phone mini
Cool program
If you’ve used the hp48, 28, or 50g then do yourself a favor and try it. Much more advanced but faithful to the vision for the 48sx. This is a much more appropriate successor to the hp48sx than the 50g was.
Fantastic project
The emulator is great indeed and runs smoothly without a problem in iPhone.
If using iPhone Xs will face small visual problem with right side labels.
If using iPhone Xs will face small visual problem with right side labels.
Display problem since 07/2025 update
The display is truncated on the right (last digit missing) since last update.
On iPhone SE 1996 and 2022.
On iPhone SE 1996 and 2022.
Amazing
This is an incredible calculator whether or not you have used an HP48. It does everything and is easy and intuitive to use, and is getting regular updates. Amazing work!
