RPN9

Name: RPN9
Rating: 4.4 (44 reviews)
Author: Flavio Ribeiro

By: Flavio Ribeiro App

RPN scientific calculator

Overview

Google Play Store

Downloads

1,218 ▲ 1

Data as of 2026-08-21

Rating:

4.40

(44)

Version:

1.0.10

Last updated: 2022-12-16

Ranking

#1,084,229 ▼ 5,955

Overall

Features & Capabilities

RPN9 is a full-featured RPN (reverse Polish notation) scientific calculator designed for engineers, scientists, and students. It offers a wide range of functions including circular, hyperbolic, and complex trigonometry, probability and statistics, complex arithmetic, unit and base conversions, and more. With non-volatile memory and customizable display modes, RPN9 provides everything you need for advanced calculations, accompanied by reference documentation for your convenience.

User Growth & Download Statistics

App

By:

Downloads:

Rating:

Version:

1.0.10 Last updated: 2022-12-16

Creation date:

2016-04-10

Publisher country:

Email:

fl*****@gmail.com

URLs:

Full description:

Source:

Google Play Store

Data ingested on:

2026-08-21

Compare stats and ranking:

Ranking

# 1,084,229 ▼ 5,955

For Developers

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Contact the developer

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Developed by:

Flavio Ribeiro

Google Play Store

https://play.google.com/store/apps/details?id=com.protasio.rpn9

Email:

fl*****@gmail.com

User Reviews

Excellent RPN calculator! Thank you!

Ko*****, 2024-09-11

Works kinda well. Nice RPN and extra stacks are useful. Buttons are too large and obscure the shifted functions. Base calculations are useful and easy to use. The C button to clear does not work on the entire stack but only while entering a new number. I cant find how to set to degrees mode. Trig functions are in radians. I can or scroll the display to see older values in the stack. The stack is of infinite size. Can it be set to a Maximum value?