# SCALE Structural Calculations vs Arthur Owner

The clearest difference is review sentiment: SCALE Structural Calculations at 100% against Arthur Owner's 0%. Arthur Owner's advantage is in-app purchases (none vs 2) and device support (3 vs 1). On price, update cadence, ads and iOS requirement there is nothing between them.

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

SCALE Structural Calculations ships an update monthly, Arthur Owner every 6 weeks. Both last shipped on June 1, 2026.

## The numbers

| Metric | SCALE Structural Calculations | Arthur Owner |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 weeks |
| Monetization | Free with in-app purchases | **Free** |
| Size | 82 MB | 29 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Fitzroy Systems Limited](https://appshunter.io/developer/1225174135) | [Arthur Online](https://appshunter.io/developer/591308435) |

## 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 |


### Arthur Owner

[App page](https://appshunter.io/ios/app/arthur-owner/id1458340195)

Gain complete insight into your rental properties. This application provides a clear overview of unit status, financial statements, and work orders. Easily access all necessary documents and track property management activities.

**Highlights:** Property visibility, Unit status tracking, Remittance statements, Work order tracking, Document access

**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 Arthur Owner free?

Arthur Owner is free to download, with no in-app purchases.

### Do SCALE Structural Calculations or Arthur Owner have ads?

Neither SCALE Structural Calculations nor Arthur Owner shows ads.

### Which is updated more often, SCALE Structural Calculations or Arthur Owner?

SCALE Structural Calculations ships an update monthly, and Arthur Owner every 6 weeks. Most recently, SCALE Structural Calculations was updated on June 1, 2026 and Arthur Owner on June 1, 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.*