RPN-45 scientific calculator

A scientific calculator based on the classic HP-45 calculator.

App info

Category :

Productivity

Update :

April 28, 2025

Installs :

5,099

Developer :

Martin Krischik

Price :

$3.99

Requires Android :

Android Varies with device

Content Rating :

Everyone

App description

Android App Analysis and Review: RPN-45 scientific calculator, Developed by Martin Krischik. Listed in Productivity Category. Current Version Is v6q, Updated On 28/04/2025 . According to users reviews on Google Play: RPN-45 scientific calculator. Achieved Over 5 thousand Installs. RPN-45 scientific calculator Currently Has 120 Reviews, Average Rating 2.8 Stars

RPN-45 scientific calculator is a true hardware emulation of the classic HP-45 calculator will behave just like the original.

The following Android functions are supported:

• Calculation results can be copies to the clipboard.
• Can be installed on the SD-Card.
• Participates in Androids build in backup and restore.
• Honeycomb Tablet compatible.
• Extra Printer for Honeycomb Tablets (visit our web-page for screen shot).

Please visit our web-page for more informations and support. Remember that the Market-Comments have no answer function and I can't help you if you post there.

What's New

minor improvements

Rate and review on Google Play store

2.8

120 total

5 46.6

4 0

3 0

2 0

1 53.4

Total number of installs (*estimated)

Estimation of total number of installs on Google Play, Approximated from number of ratings and install bounds achieved on Google Play.

Recent Comments

Walnut Close

Works exactly as advertised - an essentially perfect emulation of the 50 year old HP45. I use it for the nostalgic computation experience (the original replaced my slide rule in physics classes - I spent the small fortune of $395.00 to purchase directly from HP), and it does that perfectly.

sandor ambrus

This is a retro item that one would buy mainly for the feeling. I purchased HP 35, the first ever scientific calculator that I was gifted by my dad in my first year at university, in the Apple store. It's the exact image of the original unit and gives me immense pleasure to look at it, not to mention to use it. This app is simply missing the gist of it. Too bad and disappointing. The upside is that you are allowed to get a refund if you are not happy.

Rick Hondlik

Great app. Works fine on my LG G7 Thinq running Android 9. 4 years later, worked fine on my galaxy s20, galaxy flip 4 and now galaxy flip 6. I have never found any flaws. I purchased an hp45 in 1973, still use that calculator as well.

David King

It was brilliant. I'd got my old HP45 back! Then it went pear-shaped and I couldn't even enter a digit. Reinstalled in vain. Now it is working again 5 stars and thanks.