# Scala Architectural Scale vs Scale Conversion Calculator

The clearest difference is in-app purchases: Scale Conversion Calculator at none against Scala Architectural Scale's 1. Scale Conversion Calculator also leads on update cadence (every 5 days vs every 4 months) and review sentiment (100% vs 87%). Scala Architectural Scale's advantage is ratings volume (25 vs 4). On price, rating, ads and monetization model there is nothing between them.

Both are free to download. Scala Architectural Scale sells 1 one-off in-app purchase. Scale Conversion Calculator asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for Scala Architectural Scale against 4.5 for Scale Conversion Calculator. That said, the two scores are not equally well evidenced: Scala Architectural Scale has 25 ratings behind it against 4, so its average is the more settled of the two. Written reviews are what separate them: 87% of Scala Architectural Scale's written reviews are positive against 100% of Scale Conversion Calculator's.

Scala Architectural Scale ships an update every 4 months, Scale Conversion Calculator every 5 days. The most recent releases landed on October 5, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Scala Architectural Scale | Scale Conversion Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (25 ratings)](https://appshunter.io/ios/app/scala-architectural-scale/id1090018333/reviews)** | [4.5 (4 ratings)](https://appshunter.io/ios/app/scale-conversion-calculator/id1528811624/reviews) |
| Number of ratings | **25** | 4 |
| Positive reviews | 86.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 5 days** |
| Monetization | Free | Free |
| Size | 1 MB | 20 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Noerah Alvi](https://appshunter.io/developer/1088349320) | [TMS International LLC](https://appshunter.io/developer/1526562863) |

## 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 Conversion Calculator

[App page](https://appshunter.io/ios/app/scale-conversion-calculator/id1528811624)

This utility app facilitates weight conversions between Metric, Gross, and Net tons. It also allows for the calculation of price rates based on weight and other related calculations.

**Highlights:** Metric ton conversion, Gross ton conversion, Net ton conversion, Price rate per weight calculation, Other weight-related calculations

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Scala Architectural Scale free?

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

### Is Scale Conversion Calculator free?

Scale Conversion Calculator is free to download, with no in-app purchases.

### Which has better reviews, Scala Architectural Scale or Scale Conversion Calculator?

Scala Architectural Scale is rated higher. Scala Architectural Scale averages 4.6 out of 5 from 25 ratings, while Scale Conversion Calculator averages 4.5 from 4 ratings.

### Do Scala Architectural Scale or Scale Conversion Calculator have ads?

Neither Scala Architectural Scale nor Scale Conversion Calculator shows ads.

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

Scala Architectural Scale ships an update every 4 months, and Scale Conversion Calculator every 5 days. Most recently, Scala Architectural Scale was updated on October 5, 2026 and Scale Conversion Calculator on October 12, 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.*