Calculator app for PLC programmers

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):