# RPN Calc vs In Folio

The clearest difference is rating: RPN Calc at 4.0 against In Folio's 1.0. RPN Calc also leads on review sentiment (38% vs 0%) and monetization model (free vs paid). In Folio's advantage is update cadence (every 2 weeks vs every 3 months) and iOS requirement (13.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

RPN Calc costs $0.99 and In Folio $1.49 up front. Neither carries in-app purchases, so what you see is what you pay.

RPN Calc holds the better App Store score, 4.0 against 1.0. Both are backed by a comparable volume of ratings — 6 and 2 respectively. Written reviews point the same way: 38% of RPN Calc's written reviews are positive against 0% of In Folio's.

RPN Calc ships an update every 3 months, In Folio every 2 weeks. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | RPN Calc | In Folio |
| --- | --- | --- |
| Price | **$0.99** | $1.49 |
| Rating | **[4.0 (6 ratings)](https://appshunter.io/ios/app/rpn-calc/id285002799/reviews)** | [1.0 (2 ratings)](https://appshunter.io/ios/app/in-folio/id1483396178/reviews) |
| Number of ratings | **6** | 2 |
| Positive reviews | **37.9% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | **Free** | Paid |
| Size | 3 MB | 15 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [James Mattis](https://appshunter.io/developer/285002802) | [Alphanums](https://appshunter.io/developer/1461715998) |

## What reviewers say

### RPN Calc

[App page](https://appshunter.io/ios/app/rpn-calc/id285002799)

This app provides a straightforward reverse Polish notation (RPN) calculator experience, inspired by classic HP models. It offers a clean interface with large buttons for quick calculations on iPhone, iPad, and Apple Watch, along with a convenient Today Extension for immediate access.

**Highlights:** Reverse Polish Notation (RPN) input, Clean, simple interface, Large, easy-to-press buttons, iPhone, iPad, and Apple Watch support, Today Extension for quick access

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### In Folio

[App page](https://appshunter.io/ios/app/in-folio/id1483396178)

This app helps you create professional-looking booklets from PDF files. It automates the process of arranging, folding, and stapling pages for a polished publication. Supports various folding formats like folio, quarto, and octavo.

**Highlights:** Create booklets from PDFs, Supports folio, quarto, six, octavo folds, Automated photocomposition, Adjustable paper and print formats, Preserves original document resolution, Available in 6 languages

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RPN Calc free?

RPN Calc costs $0.99, with no in-app purchases.

### Is In Folio free?

In Folio costs $1.49, with no in-app purchases.

### Which has better reviews, RPN Calc or In Folio?

RPN Calc is rated higher. RPN Calc averages 4.0 out of 5 from 6 ratings, while In Folio averages 1.0 from 2 ratings.

### Do RPN Calc or In Folio have ads?

Neither RPN Calc nor In Folio shows ads.

### Which is updated more often, RPN Calc or In Folio?

RPN Calc ships an update every 3 months, and In Folio every 2 weeks. Most recently, RPN Calc was updated on October 24, 2026 and In Folio on October 19, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*