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Complex RPN Calculator PRO

By John Coddington

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Complex RPN Calculator is a scientific RPN calculator with a ten stack whose native number is complex. You can view and enter numbers in both polar and rectangular formats. Complex RPN remembers its state between usages and has 10 memory locations.

Pro adds portrait orientation over free version.

What's New in Version 1.3

Updated to support all display sizes.
Updated button graphics.
Updated 2nd and hyp to not auto release.


iPhone Screenshot 1
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iPad Screenshot 1
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Customer Reviews


I have used this calculator for several years under iOS 5, 6, 7, 8 and 9. It has always worked flawlessly. Its convenient handling of complex numbers is just icing on the cake. At just $0.99 it is a fantastic bargain. My thanks to the author.

Update 27 Feb 2015: It works fine under all iOS 8 versions (including 8.1.3), too. Dirty little secret: after trying latest version (works fine) I reverted to ver 1.2.1, because I prefer 2nd and hyp to auto-drop, and I like the old buttons better.

Update 19 Mar 2015: I still use this app every day on my iPad 3 and iPod 5G. It is still just great. At some point (iOS 9?) Ver 1.2.1 broke. I am now using current Ver: 1.3. I still wish for the classic HP style buttons and that the 2nd and Hyp buttons could be "non-sticky"….perhaps switchable per user preference? I notice that the file size for Ver 1.2.1 is >10X as big as the current version 1.3. Could that be why the author changed the button style?

Only Calculator that I need

I have been using this or a previous version for year and all I need to say is that it is great. The ability to have an RPN calculator on both my iPhone and iPad is great. While I have regular RPN calculator, I never have to take it out when I have my iPhone and Complex RPN Calculator with me all the time.

Is this an older version?

After I updated to the latest iOS, my phone told me this app may be causing my phone to run slow. I searched through the App Store and found that the "non-pro" version has been updated more recently (2016 vs. 2013). I'm assuming and hoping that means it will work better.

Complex RPN Calculator PRO
View in iTunes
This app is designed for both iPhone and iPad
  • Free
  • Category: Utilities
  • Updated:
  • Version: 1.3
  • Size: 0.5 MB
  • Language: English
  • Seller:

Compatibility: Requires iOS 5.0 or later. Compatible with iPhone, iPad, and iPod touch.

Customer Ratings

Current Version:
All Versions: