dCalc - a graphical RPN calculator for Psion/Revo/EPOC


Author's Note
Whats new (3.00)
English versionEnglish Manual
German versionGerman Manual
Version History
Users Comments
English version English
German version Deutsch
French version French
Italian version Italian

Why write an RPN calculator for the Psion?

Well, I needed one myself - I've been using HP calculators since the late '70s and I'll be blowed if I'll use anything else. But the Psion is just so good (excepting the built-in calculator) that I carry it around with me everywhere. Of course, the good old HP-11C/12C/16C calculators are almost collectors items now, too precious to carry.

I tried several RPN calculators for the Psion but they were either too simple (not enough functions) or too hard to use (too different to a normal HP calculator). So I decided to write one.

Having written the thing for myself I thought I'd see if anyone else could use it - so here we are. No, it hasn't made me rich - the registrations have just about paid for my Psion - but the thing that has kept me at it has really been the users. It seems that a preference for RPN calculators is also an indicator of niceness!!

Over the last 18 months or so I've worked hard to make dCalc:

  • easy to see - big clunky keys and display
  • easy to use - a full set of stack manipulation keys, just like a real HP
  • Psion-standard - you can Cut and Paste numbers to and from other applications; shortcut keys work as you might expect
  • full functions - well there's always more I could add - let me know what you want for the next version

I hope you like it!

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This page last updated on Mon Dec 23 10:33:38 EST 2002
For corrections/additions/suggestions for this page, please send email to: bhepple@freeshell.org