# BIRM Mobile App vs Structural SteelBook

The clearest difference is price: BIRM Mobile App at Free against Structural SteelBook's $4.99. BIRM Mobile App also leads on rating (5.0 vs 4.7) and iOS requirement (7.0 vs 16.0). Structural SteelBook's advantage is update cadence (every 3 days vs every 11 months). On ratings volume, ads, in-app purchases and device support there is nothing between them.

BIRM Mobile App is free to download; Structural SteelBook costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

BIRM Mobile App holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 3 and 6 respectively.

BIRM Mobile App ships an update every 11 months, Structural SteelBook every 3 days. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | BIRM Mobile App | Structural SteelBook |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/birm-mobile-app/id1105006017/reviews)** | [4.7 (6 ratings)](https://appshunter.io/ios/app/structural-steelbook/id6444883369/reviews) |
| Number of ratings | 3 | **6** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 3 days** |
| Monetization | **Free** | Paid |
| Size | 96 MB | 71 MB |
| Requires iOS | **7.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [United States Department of Transportation](https://appshunter.io/developer/672945216) | [David Homes](https://appshunter.io/developer/320954174) |

## What reviewers say

### BIRM Mobile App

[App page](https://appshunter.io/ios/app/birm-mobile-app/id1105006017)

This mobile reference manual provides comprehensive guidance on inspecting and evaluating highway bridges. It's designed for bridge inspectors, engineers, and owners to use in the field for procedures and techniques.

**Highlights:** Highway bridge inspection guidance, Evaluation of in-service bridges, Field use for inspectors, Reference manual for engineers, Procedures and techniques

**Features:** macOS Compatibility

**In-app purchases:** none


### Structural SteelBook

[App page](https://appshunter.io/ios/app/structural-steelbook/id6444883369)

Access a comprehensive reference for structural steel shapes, including multiple AISC library versions. Easily switch between imperial and metric units, sort sections, and perform quick searches. Print or share section properties and cross-sections.

**Highlights:** Multiple AISC library versions (v15, v13, v14, LRFD, ASD), Imperial and metric unit switching, Sort sections by property, Quick search for steel sections, Side-by-side imperial/metric equivalencies, Print and share section properties, Dark/light mode and dynamic type support

**In-app purchases:** none


## Frequently asked questions

### Is BIRM Mobile App free?

BIRM Mobile App is free to download, with no in-app purchases.

### Is Structural SteelBook free?

Structural SteelBook costs $4.99, with no in-app purchases.

### Which has better reviews, BIRM Mobile App or Structural SteelBook?

BIRM Mobile App is rated higher. BIRM Mobile App averages 5.0 out of 5 from 3 ratings, while Structural SteelBook averages 4.7 from 6 ratings.

### Do BIRM Mobile App or Structural SteelBook have ads?

Neither BIRM Mobile App nor Structural SteelBook shows ads.

### Which is updated more often, BIRM Mobile App or Structural SteelBook?

BIRM Mobile App ships an update every 11 months, and Structural SteelBook every 3 days. Most recently, BIRM Mobile App was updated on October 24, 2026 and Structural SteelBook on October 27, 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.*