# SCALE Structural Calculations vs Scan Flow

The clearest difference is iOS requirement: SCALE Structural Calculations at 12.0 against Scan Flow's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. SCALE Structural Calculations sells 2 in-app purchases, starting at $50.99 per month and Scan Flow sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

SCALE Structural Calculations ships an update monthly, Scan Flow fortnightly. The most recent releases landed on October 7, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | SCALE Structural Calculations | Scan Flow |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free with in-app purchases | — |
| Size | 82 MB | 3 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Fitzroy Systems Limited](https://appshunter.io/developer/1225174135) | [All Good Folks Limited](https://appshunter.io/developer/6774755732) |

## 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 |


### Scan Flow

[App page](https://appshunter.io/ios/app/scan-flow-document-scanner/id6778015862)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scan Flow Pro | $4.99 | one-time |


## Frequently asked questions

### Is SCALE Structural Calculations free?

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

### Is Scan Flow free?

Scan Flow is free to download, with in-app purchases available.

### Do SCALE Structural Calculations or Scan Flow have ads?

Neither SCALE Structural Calculations nor Scan Flow shows ads.

### Which is updated more often, SCALE Structural Calculations or Scan Flow?

SCALE Structural Calculations ships an update monthly, and Scan Flow fortnightly. Most recently, SCALE Structural Calculations was updated on October 7, 2026 and Scan Flow on October 14, 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.*