# John Cominio RPN Calculator — user reviews

> 5 indexed App Store user reviews of John Cominio RPN Calculator by John Cominio, rated 4.90/5 from 9 ratings.

- Source: https://appshunter.io/ios/app/john-cominio-rpn-calculator/id672875842/reviews
- App overview in markdown: https://appshunter.io/ios/app/john-cominio-rpn-calculator/id672875842.md
- Rating breakdown: 5★ 8 · 4★ 1 · 3★ 0 · 2★ 0 · 1★ 0

## Most critical reviews (5 lowest-rated)

### 2/5 — Almost!

*2020-05-01*

A very nice looking RPN calculator with some of the most commonly used scientific functions.

In portrait orientation, the calculator fits the screen beautifully. However, although it rotates for landscape view the calculator remains fixed with no change to its dimensions, meaning the bottom of it is not visible and not accessible.

I mostly use my iPad horizontally in its case like a mini-laptop so this unfortunate inconvenience has led to its deletion.

### 4/5 — Pretty good app but buttons are kind of small

*2017-04-13*

It's a pretty good app that works very well. One thing that I don't like about it is that the buttons are pretty small. On the other hand, it's free. You can't expect a Mercedes for a Hyundai price.

### 5/5 — RPN is the best

*2022-11-21*

Have used this app for years. Very pleased

### 5/5 — Myles

*2019-11-15*

Love the RPN (Reverse Polish Notation)!

### 5/5 — Nice job

*2014-01-16*

Clean interface. Does it's Job well.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-17.*