# Scala Architectural Scale vs Scale Ratio

The clearest difference is rating: Scala Architectural Scale at 4.6 against Scale Ratio's 3.7. Scala Architectural Scale also leads on monetization model (free vs free with in-app purchases) and ratings volume (25 vs 3). Scale Ratio's advantage is update cadence (fortnightly vs every 4 months) and iOS requirement (10.0 vs 15.6). On price, review sentiment, 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 Scale Ratio sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scala Architectural Scale holds the better App Store score, 4.6 against 3.7. That said, the two scores are not equally well evidenced: Scala Architectural Scale has 25 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 87% of Scala Architectural Scale's written reviews are positive against 83% of Scale Ratio's.

Scala Architectural Scale ships an update every 4 months, Scale Ratio fortnightly. The most recent releases landed on July 17, 2026 and August 14, 2026 respectively.

## The numbers

| Metric | Scala Architectural Scale | Scale Ratio |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (25 ratings)](https://appshunter.io/ios/app/scala-architectural-scale/id1090018333/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/scale-ratio/id1448744741/reviews) |
| Number of ratings | **25** | 3 |
| Positive reviews | **86.7% of reviews** | 83.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 25 MB |
| Requires iOS | 15.6 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Noerah Alvi](https://appshunter.io/developer/1088349320) | [Adrien Brecheteau](https://appshunter.io/developer/956859837) |

## 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 |


### Scale Ratio

[App page](https://appshunter.io/ios/app/scale-ratio/id1448744741)

Easily convert distances between any scales for projects like architecture and model building. Input your measurements and desired scale to instantly calculate scaled distances.

**Highlights:** Convert distances between any scales, Supports architecture and modeling projects, Instant calculation of scaled distances, User-friendly input for distance and scale

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Delete Ads in the app | $4.99 | one-time |


## Frequently asked questions

### Is Scala Architectural Scale free?

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

### Is Scale Ratio free?

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

### Which has better reviews, Scala Architectural Scale or Scale Ratio?

Scala Architectural Scale is rated higher. Scala Architectural Scale averages 4.6 out of 5 from 25 ratings, while Scale Ratio averages 3.7 from 3 ratings.

### Do Scala Architectural Scale or Scale Ratio have ads?

Neither Scala Architectural Scale nor Scale Ratio shows ads.

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

Scala Architectural Scale ships an update every 4 months, and Scale Ratio fortnightly. Most recently, Scala Architectural Scale was updated on July 17, 2026 and Scale Ratio on August 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.*