# SCALE Structural Calculations vs BLUETRAX MOBILE

The clearest difference is in-app purchases: BLUETRAX MOBILE at none against SCALE Structural Calculations's 2. BLUETRAX MOBILE also leads on update cadence (every 10 days vs monthly) and device support (3 vs 1). SCALE Structural Calculations's advantage is iOS requirement (12.0 vs 15.6). On price and ads there is nothing between them.

Both are free to download. SCALE Structural Calculations sells 2 in-app purchases, starting at $50.99 per month. BLUETRAX MOBILE asks for nothing beyond the download.

SCALE Structural Calculations ships an update monthly, BLUETRAX MOBILE every 10 days. The most recent releases landed on October 7, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | SCALE Structural Calculations | BLUETRAX MOBILE |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 10 days** |
| Monetization | Free with in-app purchases | — |
| Size | 82 MB | 19 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Fitzroy Systems Limited](https://appshunter.io/developer/1225174135) | [Rivercross](https://appshunter.io/developer/1439826306) |

## What reviewers say

### SCALE Structural Calculations

[App page](https://appshunter.io/ios/app/scale-structural-calculations/id1225174136)

This app provides structural engineers with tools to perform calculations and generate component details for various structural elements. It offers a comprehensive library of proformas and expert systems for reinforced concrete, steelwork, timber, and masonry detailing, supporting both Eurocodes and British Standards.

**Highlights:** Structural calculations for beams, columns, slabs, Component detailing for steel, concrete, masonry, timber, Library of over 600 proforma calculations, Expert systems for detailing (LUCID, SPADE), 2D/3D elastic analysis (NL-STRESS), PDF and DOCX output for submission, Support for Eurocodes and British Standards

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full subscription to SCALE | $50.99 | per month |
| Full subscription to SCALE | $299.99 | per year |


### BLUETRAX MOBILE

[App page](https://appshunter.io/ios/app/bluetrax-mobile/id1439914056)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SCALE Structural Calculations free?

SCALE Structural Calculations is free to download, with in-app purchases available.

### Is BLUETRAX MOBILE free?

BLUETRAX MOBILE is free to download, with no in-app purchases.

### Do SCALE Structural Calculations or BLUETRAX MOBILE have ads?

Neither SCALE Structural Calculations nor BLUETRAX MOBILE shows ads.

### Which is updated more often, SCALE Structural Calculations or BLUETRAX MOBILE?

SCALE Structural Calculations ships an update monthly, and BLUETRAX MOBILE every 10 days. Most recently, SCALE Structural Calculations was updated on October 7, 2026 and BLUETRAX MOBILE on October 26, 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.*