# API Pipe Properties vs Structural SteelBook

The clearest difference is update cadence: Structural SteelBook at every 3 days against API Pipe Properties's every 39 months. Structural SteelBook also leads on device support (3 vs 1) and iOS requirement (16.0 vs 18.0). API Pipe Properties's advantage is price ($1.99 vs $4.99). On ads and in-app purchases there is nothing between them.

API Pipe Properties costs $1.99 and Structural SteelBook $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

API Pipe Properties ships an update every 39 months, Structural SteelBook every 3 days. The most recent releases landed on October 1, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | API Pipe Properties | Structural SteelBook |
| --- | --- | --- |
| Price | **$1.99** | $4.99 |
| Rating | — | **[4.7 (6 ratings)](https://appshunter.io/ios/app/structural-steelbook/id6444883369/reviews)** |
| Number of ratings | — | **6** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 3 days** |
| Monetization | — | Paid |
| Size | 11 MB | 71 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [zhandos uakanov](https://appshunter.io/developer/625286817) | [David Homes](https://appshunter.io/developer/320954174) |

## What reviewers say

### API Pipe Properties

[App page](https://appshunter.io/ios/app/api-pipe-properties/id1044718618)

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

**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 API Pipe Properties free?

API Pipe Properties costs $1.99, with no in-app purchases.

### Is Structural SteelBook free?

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

### Do API Pipe Properties or Structural SteelBook have ads?

Neither API Pipe Properties nor Structural SteelBook shows ads.

### Which is updated more often, API Pipe Properties or Structural SteelBook?

API Pipe Properties ships an update every 39 months, and Structural SteelBook every 3 days. Most recently, API Pipe Properties was updated on October 1, 2026 and Structural SteelBook on October 7, 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.*