# A vs SimTunnel Pro

The clearest difference is update cadence: A at every 9 months against SimTunnel Pro's every 39 months. SimTunnel Pro's advantage is price ($1.99 vs $4.99) and iOS requirement (15.6 vs 18.6). On ads, in-app purchases and device support there is nothing between them.

A costs $4.99 and SimTunnel Pro $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

A ships an update every 9 months, SimTunnel Pro every 39 months. The most recent releases landed on October 6, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | A | SimTunnel Pro |
| --- | --- | --- |
| Price | $4.99 | **$1.99** |
| Rating | **[1.0 (2 ratings)](https://appshunter.io/ios/app/a-beam-plus/id477748904/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 9 months** | Every 39 months |
| Monetization | Paid | — |
| Size | 53 MB | 5 MB |
| Requires iOS | 18.6 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jutarus Ratanasethakul](https://appshunter.io/developer/1454380236) | [Roozbeh Geraili Mikola](https://appshunter.io/developer/1403201499) |

## 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


### SimTunnel Pro

[App page](https://appshunter.io/ios/app/simtunnel-pro/id1493879721)

**In-app purchases:** none


## Frequently asked questions

### Is A free?

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

### Is SimTunnel Pro free?

SimTunnel Pro costs $1.99, with no in-app purchases.

### Do A or SimTunnel Pro have ads?

Neither A nor SimTunnel Pro shows ads.

### Which is updated more often, A or SimTunnel Pro?

A ships an update every 9 months, and SimTunnel Pro every 39 months. Most recently, A was updated on October 6, 2026 and SimTunnel Pro 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.*