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Plus42

Enhanced HP-42S Calc Simulator

Published by: Thomas Okken

Description

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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Plus42 FAQ

  • Is Plus42 free?

    Yes, Plus42 is completely free and it doesn't have any in-app purchases or subscriptions.

  • Is Plus42 legit?

    ✅ The Plus42 app appears to be high-quality and legitimate. Users are very satisfied.

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  • How much does Plus42 cost?

    Plus42 is free.

  • What is Plus42 revenue?

    To get estimated revenue of Plus42 app and other AppStore insights you can sign up to AppTail Mobile Analytics Platform.

Germany
User Rating

5 out of 5

19 ratings in Germany

5 star
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Ratings History

Plus42 Reviews

Einfach der perfekte Taschenrechner

Chrischmi on

Germany

Auf meinem Schreibtisch liegen seit 30 Jahren Taschenrechner von HP. Am häufigsten nutze ich den HP 32Sii. Mit dem Plus42 muss ich auch unterwegs nicht auf den Komfort eines RPN-Taschenrechners verzichten, sondern habe ihn allzeit griffbereit dabei. Mittlerweile hole ich sogar im Büro den physischen HP Rechner kaum noch aus der Schublade, weil die App mindestens genauso gut ist.

Der letzte Taschenrechner! Der totale Hammer! Killer-App! :-)))

luckyroland on

Germany

Als Luft- und Raumfahrtingenieur habe ich eigentlich keine Zeit Bewertungen abzugeben. Hier muss(!) ich aber mal eine Ausnahme machen. Thomas Okken hat mit dem Plus42 meine fast 50-jährige Suche nach dem(!) Ingenieur-Taschenrechner für den Maschinenbau beendet. Die App ist der totale Hammer! Jede Ing.-wichtige Taste ist jetzt bei mir auf der obersten Ebene! Keine(!) Umschalttaste mehr! Dann noch UPN bzw. RPN, mehr geht nicht. In Sachen Geschwindigkeit zieht der Inhaber der App damit allen davon! Ferner gibt es den noch für alle Plattformen und auch als Desktop-Version! Die Programme können auch noch getauscht werden! Der Rechner erweitert den DM42 von SwissMicros für 200 CHF sogar noch um 6 Tasten! Der Rechner und das ist der Hammer, arbeitet mit 128 Bit Genauigkeit! D. h. Exponenten von -6143 bis +6144 sind somit kein Problem mehr. Einfach mal die Fakultät von 70 berechnen lassen: 70! und die meisten Taschenrechner melden sich dann ab. Nicht aber der Plus42, der hält, was er verspricht! Absolute Kaufempfehlung von mir für Ingenieure! Thomas, Peta-Dank, was für ein Job! :-))))))))))))))

Ich bin begeistert!

JanT3r on

Germany

Vielen Dank für diese schöne Weiterentwicklung des HP 42s/Free 42!

Best calculator I've seen

LE2357 on

United States

I tried several calculators apps and in my opinion this one is the best by far. It has much more than I need and yet it is easy to use and intuitive. This is the one I use most.

Love This

Bill Graves - Tampa on

United States

In college I was an HP41C user. Once in my first engineering job I switched to the HP42S which has served me well over my 30+ year career. Once iPhones became a thing, I loaded Thomas’s Free42 and have been using that for a couple decades. I still have a real 42S on my desk for daily use. I recently purchased an HP Prime which is a lovely calculator but it’s just not completely comfortable to use. Switching to Thomas’s Plus42 feels really comfortable and adds lots of lovely features. I will likely purchase a SwissMicro DM42 to be used as my daily desk calc so that my phone app and physical desk calc are similar. That would send the 42S to the vintage calc cabinet. Honestly having this on my phone is massively so functional it’s hard to justify even owning a physical calc but there are times at the desk when it’s nice to grab the physical unit with tactile keys that can’t be interrupted with alerts :-). This is a beautiful upgrade to the free42. Thanks Thomas!

Need multitasking

olegyk on

United States

When using on iPad, the app occupies the whole screen. Currently it does not support multitasking. But it would great to share the screen with other apps (side or floating window).

Beautiful and functional at the same time

Chimichanga69 on

United States

Thomas has done an outstanding job on this app! It is not only the most beautiful calculator app out there, but it’s also the most powerful and functional of any of the HP inspired calculator app. The graphics are outstanding and the “extras” that were added in addition to the 42s standard makes the app even more appealing. If you know how to use a RPN calculator, this IS the one to have and use. If you don’t know how to use a RPN calculator, learn how and buy this. I always carry my phone, but rarely my physical DM42 or “real” 42s. You won’t regret getting this app. Congratulations Thomas for all the work you have done over the years relating to the 42. You should be proud.

The best calculator-computer period

Bprijadi on

United States

With some programming, this can replace both of my units conversion and finance calculators apps. It is that powerful. I hope - and still have not figured out - we could use and call the TVM variables (PMT, FV, etc) in our custom programs, rather than duplicate the already available functions.

Best Programmable Calculator

bquin on

United States

Have been using Free42 for years but Plus42 is Free42 on steroids. The new features like Dir and Eqn are great enhancements. Many thanks for to this developer for all his efforts.

Thanks for this app

Mist02 on

United States

I have been using free42 for long time and I am glad you are offering a premium version and I can contribute to the developer of a great app.

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157
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248
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253

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