iPhone app RPN-70 SD

RPN-70 SD is a complete simulation of the financial hand-held calculator HP-70 from 1974.
It handles loan amortization, saving plans, depreciation, and much more with ease.

What users said:

Looks good, all functions you need.
Love it!

This is a beautiful emulation of a very rare HP financial calculator from 1974.
Works just like the original but better! Faster, more accurate, with 10 more storage registers, and a popup window lets you see the contents of each stack, financial and storage register.
Provides TVM4 functionality for compound interest as well as accumulated simple interest.
A true work of art!

Features:

Photo-realistic look based on an existing device

Animated keys with click sound (adjustable volume)

All functions and operations of the HP-70 fully implemented

Correct wrong number entries by swiping across the display

Cut/copy/paste of display value

Double-tap display to view the stack and memory registers

Visual indicators keep track of input parameters entered

10 non-volatile memory registers (not available in original HP-70)

The HP-70 was discontinued after just one year.
It is one of the rarest calculators, hard to find in any condition.

NOTE:

RPN-70 SD is a faithful simulation of a vintage HP-70 calculator, as has been verified against a real device using the examples in the Applications Cookbook section of the HP-70 manual.
In certain cases, what may appear like a bug of the app is actually an idiosyncrasy of the HP-70.

`IMPORTANT: The HP-70 requires exactly three input parameters from the top-row keys, at least one of them being either n or i.
In other words, you cant use PMT, PV, and FV as input parameters simultaneously.` +

A version for the iPhone named RPN-70 HD is also available.

Short manual and sample calculations on the website: www.cuveesoft.ch,

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