Scala Architectural Scale vs Scale Ratio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Scala Architectural Scale
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.
- 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
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Let Scala Architectural and Engineering Scale change the way you measure printed drawings on the go and at your desk. With fixed and variable scales there is no limit to measuring a printed drawing of any scale, even if the scale is unknown. FIXED SCALES If you know the scale of a drawing, place your device on the drawing, scroll to the scale of the printed drawing and watch the chosen scale slide in. VARIABLE SCALES If the scale of a drawing is unknown, slide your finger on the variable scale and match the scale of one known element, lock it and use it to measure all elements on that drawing. MEASURING Slide the measurement slider in fixed or variable scale modes, along the scale to see the desired measurement displayed. SECONDARY UNITS Choose secondary units to be displayed while measuring, to quickly convert between metric, decimal feet and feet and inches. PRECISION Control the precision of the measurement units. —-— Scala Free Version includes: ARCHITECTURAL Fixed Scales: Full Scale (12”=1’-0”), 6”=1’-0”, 3”=1’-0”, 1 1/2”=1’-0”, 1”=1’-0”, 3/4”=1’-0” Variable Scale Range: Between full scale and 1/32”=1’-0” ENGINEERING Fixed Scales: 1”=10’, 1”=20’, 1”=30’, 1”=40’, 1”=50’ and 1”=60’ Variable Scale Range: Between 1”=10’ and 1”=300’ METRIC Fixed Scales: 1:1, 1:2, 1:5, 1:10, 1:20, 1:25 Variable Scale Range: Between 1:1 and 1:1000 Scala Full Version includes all scales above plus the following: ARCHITECTURAL Fixed Scales: 1/2”=1’-0”, 3/8”=1’-0”, 1/4”=1’-0”, 3/16”=1’-0”, 1/8”=1’-0”, 3/32”=1’-0”, 1/16”=1’-0”, 1/32"=1'-0" ENGINEERING Fixed Scales: 1"=80', 1"=100', 1"=200', 1"=300' METRIC Fixed Scales: 1:30, 1:40, 1:50, 1:75, 1:100, 1:125, 1:200, 1:250, 1:300, 1:400, 1:500, 1:1000 —-—
Scale Ratio
Easily convert distances between any scales for projects like architecture and model building. Input your measurements and desired scale to instantly calculate scaled distances.
- Convert distances between any scales
- Supports architecture and modeling projects
- Instant calculation of scaled distances
- User-friendly input for distance and scale
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Scale a measurement to a larger or smaller measurement, which is useful for architecture, modelling, and other projects. This app can be used to easily convert any distance in any scale to any other distance in any other scale. Simply enter the distance and scale to convert and the result will be displayed instantly. You need for example to create a mock up of a building at the scale 1:500. Enter the ground distances in the calculator, set the scale ratio to 1:500 and you'll get the mock up distance.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Scala Architectural Scale | Scale Ratio |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (25 ratings) — better | 3.7 (3 ratings) |
| Positive reviews | 86.7% of reviews — better | 83.3% of reviews |
| Number of ratings | 25 — better | 3 |
| Update frequency | Every 4 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 10.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | Noerah Alvi | Adrien Brecheteau |
Customer experience
Scala Architectural Scale
Scale Ratio
In-app purchases
Scala Architectural Scale
- Scala Full Version$2.99
Scale Ratio
- Delete Ads in the app$4.99
Questions
Is Scala Architectural Scale free?
Is Scale Ratio free?
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Which is updated more often, Scala Architectural Scale or Scale Ratio?
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