SiCalc is a calculator application developed for PLC programmers. Currently only android support, you can download and test for free from the link below.
https://play.google.com/store/apps/details?id=com.sicalc.hesapla

 

Nice, I always use the HP42s emulator everywhere. Especially since it has a good support for HEX/DEC/BIN conversion, and I prefer to work with RPN calculators, then I don't have to use brackets all the time.
Also works great with automatic engineering unit scaling in the correct steps: x10-3, x10-6 etc....

You can download it here (I have it on all my laptops): https://thomasokken.com/free42/

 

This is a calculator application developed for PLC programmers. Currently only android support, you can download and test for free from the link below.
https://www.calculatorspro.com/

 

Nice, I always use the HP42s emulator everywhere. Especially since it has a good support for HEX/DEC/BIN conversion, and I prefer to work with RPN calculators, then I don't have to use brackets all the time.
Also works great with automatic engineering unit scaling in the correct steps: x10-3, x10-6 etc....

You can download it here (I have it on all my laptops): https://thomasokken.com/free42/

I have the DM42 and it is a thing of beauty. The HP42S is one of the HP calculators that have escaped my interest. Maybe one day.

For my normal calculator app, it's Greg Hewgill's HP-15C emulator found over at www.hp15c.com
For bit-banging, it's Jamie O'Connell's HP16C emulator found over at www.hp16c.net

But you can't go wrong with Free42.

And I also have a bunch of very nice slide rules.