Janus Calculator

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

Productivity

Free · Designed for iPad. Not verified for macOS.

1 Rating
Ages

4+
Years
Category

Productivity
Developer

Geoffrey Domm
Language

EN
English
Size

1.4
MB

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.

Ratings & Reviews

2.0

out of 5

1 Ratings

Correction to previous review
12/16/2017

Cheapskate01
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.
Correction to previous review
12/16/2017

Cheapskate01

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
09/04/2010

Charlie-54
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!
Easy interfaces
09/04/2010

Charlie-54

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.
05/28/2010

Math Geek 2.0
Love this. Works on my ipad. Well done.
This is great! Just like my old HP.
05/28/2010

Math Geek 2.0

Love this. Works on my ipad. Well done.
Non math geek
11/19/2010

julie119
Easy to understand and operate
Non math geek
11/19/2010

julie119

Easy to understand and operate

Updated to IOS15

Version 2.2 12/12/2021

Data Not Collected

The developer does not collect any data from this app.

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Accessibility

Information

Seller: Geoffrey Domm
Size: 1.4 MB
Category: Productivity
Compatibility: Requires iOS 15.0 or later.

iPhone
Requires iOS 15.0 or later.

iPad
Requires iPadOS 15.0 or later.

iPod touch
Requires iOS 15.0 or later.

Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.

Apple Vision
Requires visionOS 1.0 or later.
Languages: English
Age Rating: 4+

4+

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