Simply a very good traditional scientific calculator. Nothing to get on the way, just works. Great.
RPN modes have no stack manipulation controls at all (swap, drop, rotate). So one has to use memory, in which case there's no point in using an RPN calculator.
Where is the paid version?
Sony Xperia Z Hello Thanks
A very good calculator that does everything I need for engineering design both in the office and on site. The author is also very happy to discuss features and quick to fix bugs, definitely the best calculator I have found on android.