# SCALE Structural Calculations vs Numline

The clearest difference is price: SCALE Structural Calculations at Free against Numline's $0.99. SCALE Structural Calculations also leads on iOS requirement (12.0 vs 18.0). Numline's advantage is in-app purchases (none vs 2) and update cadence (every 2 days vs monthly). On ads and device support there is nothing between them.

SCALE Structural Calculations is free to download; Numline costs $0.99 up front. SCALE Structural Calculations sells 2 in-app purchases, starting at $50.99 per month. Numline asks for nothing beyond the download.

SCALE Structural Calculations ships an update monthly, Numline every 2 days. The most recent releases landed on October 7, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | SCALE Structural Calculations | Numline |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 82 MB | 5 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Fitzroy Systems Limited](https://appshunter.io/developer/1225174135) | [Zhiqi Pan](https://appshunter.io/developer/1893386703) |

## 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 |


### Numline

[App page](https://appshunter.io/ios/app/numline-calculator-notepad/id6797324592)

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

**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 Numline free?

Numline costs $0.99, with no in-app purchases.

### Do SCALE Structural Calculations or Numline have ads?

Neither SCALE Structural Calculations nor Numline shows ads.

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

SCALE Structural Calculations ships an update monthly, and Numline every 2 days. Most recently, SCALE Structural Calculations was updated on October 7, 2026 and Numline on September 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.*