Janus Calculator 4+

Name: Janus Calculator
Rating: 2 (1 reviews)
Author: Geoffrey Domm

Geoffrey Domm

Designed for iPad

- 2.0 • 1 Rating

- Free

Description

Two-sided calculator. Side A uses Standard Notation, Side B uses Reverse Polish Notation. Both calculators are programmable, include various finance and scientific functions, and the values of 45 physical constants. Also includes a Black-Scholes option calculator, including calculation of implied values for each of the inputs.

Dec 12, 2021

Version 2.2

Updated to IOS15

2.0 out of 5

1 Rating

Correction to previous review

The Janus Calculator appears to be a simulation of the HP-12C augmented with some HP-11C and the Black Scholes functions.

Apparently, the current edition is best version; the earlier version is not worth downloading. However, the current version only works on iOS 10 or 11. Therefore, this will not work on earlier iOS devices (like iPad 2 or iPhone 4S). That is why I deduct two stars.

Landscape mode makes the Janus Calculator resemble the HP-12C. Minor glitch, both iPhone SE and iPad Pro: "Flip" and "i" are not available in landscape mode. ("Flip" is how to switch between RPN and standard mode; "i" is access to help and other features). No stars deducted for this.

Easy interfaces

I'm old enough to remember the early handheld calculators, and what a difference it made to have a calculator with a full instruction set and a sensible interface. This app does it well, twice, plus offering a few useful constants. Bravo!

This is great! Just like my old HP.

Love this. Works on my ipad. Well done.

The developer, Geoffrey Domm, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.