Plus42

Installs

1.9k

Rating

5.0

Rating count

< 500

Category	Tools
Developer	Thomas Okken
Price	9.49
First release	4/27/2022 (3 years ago)
Version	1.3.8a
In-app purchases	No
Contains ads	No
Content rating	Everyone
Package name	com.thomasokken.plus42

View on Play Store

Core Metrics

Data Breakdown

Date	Rating Count	Average Rating	Installs	Version
6/24/2025	162	4.977	1,941	1.3.8a
6/23/2025	161	4.977	1,939	1.3.8a
6/22/2025	161	4.977	1,938	1.3.8a
5/29/2025	159	5.000	1,911	N/A
5/28/2025	157	5.000	1,903	N/A
5/27/2025	157	4.976	1,903	N/A
5/24/2025	157	4.976	1,900	N/A
4/28/2025	154	4.976	1,862	N/A
4/24/2025	154	4.976	1,861	N/A
4/15/2025	152	4.975	1,848	N/A
3/10/2025	152	4.975	1,825	N/A
2/27/2025	152	4.975	1,782	N/A
2/20/2025	150	4.975	1,770	N/A
2/17/2025	149	4.974	1,765	N/A

Details

Plus42 is an advanced scientific programmable calculator, based on Free42. Free42, in turn, is a complete re-implementation of the HP-42S scientific programmable RPN calculator, which was made from 1988 until 1995 by Hewlett-Packard. Free42 is a complete rewrite and contains no HP code whatsoever.

Plus42 builds on Free42 and adds: Algebraic expressions modeled after those used on the HP-27S and HP-17B/19B; attached units and unit conversions modeled after those used on the HP-48/49/50 series; directories for more organized storage of programs and variables; a larger display, with 8 rows and 22 columns (131x64 pixels) by default, which the user may resize at will; time value of money and amortization schedules; and two-dimensional plotting of functions, with ability to zoom and pan, and find integrals and roots from points in the plot.

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