Students and scientists from the 1980s will remember the classic RPN scientific calculators. These calculators strike a perfect balance between functionality and complexity.
* Complex number arithmetic and trig functions
* Matrix calculations
* Numerical root finder
* Numerical integration
* Statistical functions, linear regression
* Fully programmable
This app is completely free, no ads or extra bits to buy. I love this calculator and I like to share.
Updated 64 bit build that will survive long past the next iOS update.
Also, the calculator display now scales correctly for all iPhone screen sizes.
The name of the app has been changed to "Retro 15C". It's still free and always will be.
Thank you for your support!
Up to six family members will be able to use this app with Family Sharing enabled.