RPN-70 SD

RPN-70 SD

Very rare vintage calculator

11 ratings
6 reviews
Free

Details

  • Released
  • Updated
  • November 12, 2013
  • October 17, 2025

Features

RPN-70 SD screenshot #1 for iPhone
RPN-70 SD screenshot #2 for iPhone
RPN-70 SD screenshot #3 for iPhone
RPN-70 SD screenshot #4 for iPhone
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About

This app is a faithful simulation of a rare 1974 financial calculator, offering all its original functions with enhanced features like more memory registers and a visual stack display. It's designed for users who appreciate vintage technology and need precise financial calculations.

Photo-realistic vintage calculator design
Full HP-70 function simulation
Animated keys with sound
Enhanced stack and memory register view
Cut/copy/paste display value
Input parameter visual indicators
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What's New in RPN

3.4.1

October 17, 2025

• Improved compatibility with iPhone Air and iOS 26.

User reviews

Love it

for it’s elegant and simple interface.

5318008

55378008

A Very Useful and Classic Tool

Many sincere thanks to the development team.

No rotation on iPad is a shame

Like all of the emulators from CuVee this not only reproduces the ground-breaking wonders of long ago from Hewlett Packard, but turbocharges them with modern day computing power. It is simply superb!

My only gripe is minor and has already noted by the developer. Unlike the HP-70HD - which I also have (of course!) - it does not rotate to landscape view which seems a little inconsistent with its 5 star cousin.

That said, My previous 3 star rating was harsh: this IS a fantastic calculator; but for me its slight loss of practicality sees it just fall just short of 5 stars.
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Response from developer

iPhones are too small to allow operating portrait-oriented calculators in landscape mode in any reasonable way. Unless the layout changes totally in landscape mode, which is not the idea of these simulators. If you run RPN-70 SD on an iPad, please note that there exists an iPad-only version, RPN-70 HD, which fully supports landscape mode.

Amazing! Perfect emulation of a classic calculator

I have several Cuveesoft calculators and all are excellent. I use the RPN-70 SD for personal finance.

Developer apps

FAQ

What is RPN-70 SD?

RPN-70 SD is a complete simulation of the rare 1974 financial calculator, the HP-70. It replicates the original device's functions while offering improvements like more memory registers and a visual display of the stack and memory contents.

Is RPN-70 SD free to use?

Yes, RPN-70 SD is available for free. It does not contain advertisements or in-app purchases, offering a completely free experience for users.

What devices does RPN-70 SD support?

RPN-70 SD is designed for Apple devices and supports iPhones and iPods. A version for the iPhone, named 'RPN-70 HD', is also available.

How accurate is RPN-70 SD?

RPN-70 SD is a faithful simulation verified against a real HP-70 device using its manual. While it aims for accuracy, some perceived 'bugs' might be idiosyncrasies of the original HP-70 calculator.

Can I edit incorrect entries in RPN-70 SD?

Yes, RPN-70 SD allows you to correct wrong number entries by simply swiping across the display. This feature enhances usability compared to the original device.

How often is RPN-70 SD updated?

The latest version of RPN-70 SD is 3.4.1, last updated on October 17, 2025. This indicates a commitment to maintaining and potentially improving the application.

What are the key financial functions available in RPN-70 SD?

RPN-70 SD handles loan amortization, saving plans, depreciation, TVM (Time Value of Money) calculations for compound interest, and accumulated simple interest, among other financial operations.

Does RPN-70 SD have ads?

No, RPN-70 SD is ad-free. The application does not contain advertisements, providing an uninterrupted user experience.