# Scala Architectural Scale vs Architects Ruler

The clearest difference is device support: Scala Architectural Scale at 3 against Architects Ruler's 1. Scala Architectural Scale also leads on iOS requirement (15.6 vs 26.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Scala Architectural Scale sells 1 one-off in-app purchase and Architects Ruler sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scala Architectural Scale ships an update every 4 months, Architects Ruler every 3 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Scala Architectural Scale | Architects Ruler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (24 ratings)](https://appshunter.io/ios/app/scala-architectural-scale/id1090018333/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 86.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 1 MB | 4 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Noerah Alvi](https://appshunter.io/developer/1088349320) | [Gijs Raggers](https://appshunter.io/developer/1438841415) |

## What reviewers say

### Scala Architectural Scale

[App page](https://appshunter.io/ios/app/scala-architectural-scale/id1090018333)

This app allows users to measure printed architectural and engineering drawings directly on their device. It supports both known and unknown scales, offering fixed and variable scale options for precise measurements. Users can also select secondary units for quick conversions.

**Highlights:** Fixed and variable scale measurement, Supports unknown drawing scales, Secondary unit conversions (metric, decimal feet, feet/inches), Adjustable measurement precision, Extensive scale options for architectural, engineering, and metric drawings

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scala Full Version | $2.99 | one-time |


### Architects Ruler

[App page](https://appshunter.io/ios/app/architects-ruler/id6755367822)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime scales menu | $0.99 | one-time |


## Frequently asked questions

### Is Scala Architectural Scale free?

Scala Architectural Scale is free to download, with in-app purchases available.

### Is Architects Ruler free?

Architects Ruler is free to download, with in-app purchases available.

### Do Scala Architectural Scale or Architects Ruler have ads?

Neither Scala Architectural Scale nor Architects Ruler shows ads.

### Which is updated more often, Scala Architectural Scale or Architects Ruler?

Scala Architectural Scale ships an update every 4 months, and Architects Ruler every 3 months. Most recently, Scala Architectural Scale was updated on October 26, 2026 and Architects Ruler on October 24, 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.*