# A vs RPN

The clearest difference is rating: RPN at 5.0 against A's 1.0. RPN also leads on review sentiment (100% vs 60%) and update cadence (every 4 months vs every 9 months). On ads, in-app purchases, monetization model and device support there is nothing between them.

A costs $4.99 and RPN $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RPN holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 8 respectively. Written reviews point the same way: 60% of A's written reviews are positive against 100% of RPN's.

A ships an update every 9 months, RPN every 4 months. The most recent releases landed on October 6, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | A | RPN |
| --- | --- | --- |
| Price | $4.99 | **$2.99** |
| Rating | [1.0 (2 ratings)](https://appshunter.io/ios/app/a-beam-plus/id477748904/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/rpn-65-sd/id1176059659/reviews)** |
| Number of ratings | 2 | **8** |
| Positive reviews | 60.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 4 months** |
| Monetization | Paid | Paid |
| Best chart rank | — | **#171** |
| Size | 53 MB | 62 MB |
| Requires iOS | 18.6 | **12.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jutarus Ratanasethakul](https://appshunter.io/developer/1454380236) | [CuVee Software](https://appshunter.io/developer/424873503) |

## What reviewers say

### A

[App page](https://appshunter.io/ios/app/a-beam-plus/id477748904)

This application simplifies the design of RC beams, offering detailed calculation steps for confidence in results. It initially supports ACI 318 building codes in US and Metric units, with plans to add more design codes.

**Highlights:** Simplified RC beam design, Detailed calculation steps, ACI 318 Building Code support, US and Metric units, Future design code additions

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### RPN

[App page](https://appshunter.io/ios/app/rpn-65-sd/id1176059659)

**Currently charting:** #171 Top Paid · Productivity (US App Store)

Experience a faithful simulation of the groundbreaking HP-65 programmable calculator on your iPhone. This app offers virtual program and data cards, a paper tape printer, and a robust card manager. Explore four distinct operating modes, including an enhanced "Super-65" option.

**Highlights:** Virtual program and data cards, Virtual paper tape printer with AirPrint, Database-driven card manager, Create, delete, and organize unlimited cards, Sharing via email, AirDrop, Dropbox, iTunes, Paste and run existing HP-65 listings, Four distinct operating modes

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is A free?

A costs $4.99, with no in-app purchases.

### Is RPN free?

RPN costs $2.99, with no in-app purchases.

### Which has better reviews, A or RPN?

RPN is rated higher. A averages 1.0 out of 5 from 2 ratings, while RPN averages 5.0 from 8 ratings.

### Do A or RPN have ads?

Neither A nor RPN shows ads.

### Which is updated more often, A or RPN?

A ships an update every 9 months, and RPN every 4 months. Most recently, A was updated on October 6, 2026 and RPN on October 12, 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.*