Comparison

Scale vs Scale Ratio

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Scale

This tool simplifies scaling and unit conversions for creators. It offers a vast library of scales and units, allowing for seamless adjustments and precise calculations. Customize the interface to match your workflow and focus on your projects.

Highlights
  • Extensive database of scales and units
  • Customizable scales and units
  • Imperial and metric conversions
  • Fractional and decimal rounding
  • Conversion history
  • Customizable buttons
Features
Read full description

Build models and other scaled objects faster and more accurately with Scale-o-Tron. Model builders, architects, tabletop gamers, doll makers, train enthusiasts, sculptors, set designers, and anyone else who builds to scale can focus on their craft instead of on conversions. Features: • Convert from any scale and unit to any other scale and unit. You are not limited to converting from 1:1. • Mix scales and units in a calculation; Scale-o-Tron handles the conversions. • A large library of common scales, organized for quick access, plus your own custom scales. • Metric and imperial units, including historical units for old schematics and literature. • Fine control over numerical precision and display. Fraction rounding keeps imperial measurements practical. • Customize and save as many calculator layouts as you like, each suited to a type of project. • Adjust button and display size to your preference. Whether you build from scratch or from kits, Scale-o-Tron keeps your project accurate and lets you focus on the build. Visit the website to learn how Scale-o-Tron can help with your projects.

About

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.

Highlights
  • Convert distances between any scales
  • Supports architecture and modeling projects
  • Instant calculation of scaled distances
  • User-friendly input for distance and scale
Features
Read full description

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

Scale4 screens
Scale Ratio3 screens

Verdict

The call

The clearest difference is price: Scale Ratio at Free against Scale's $4.99. Scale Ratio also leads on review sentiment (83% vs 67%) and device support (3 vs 1). Scale's advantage is rating (4.2 vs 3.7) and in-app purchases (none vs 1). On ratings volume, update cadence and ads 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

CostPrice · In-app purchases · Ads · Monetization

Scale Ratio is free to download; Scale costs $4.99 up front. Scale Ratio sells 1 one-off in-app purchase. Scale asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Scale holds the better App Store score, 4.2 against 3.7. Both are backed by a comparable volume of ratings — 5 and 3 respectively. Written reviews complicate that: 67% of Scale's written reviews are positive against 83% of Scale Ratio's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Scale ships an update every 8 days, Scale Ratio fortnightly. Both last shipped on October 24, 2026.

Scorecard7 real differences · 3 level
Scale versus Scale Ratio: the parameters behind the verdict, then further details
ParameterScaleScale Ratio
Price$4.99Free — better
Rating4.2 (5 ratings) — better3.7 (3 ratings)
Positive reviews66.7% of reviews83.3% of reviews — better
Number of ratings5 — better3
Update frequencyEvery 8 days — betterFortnightly
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.010.0 — better
Further details — not scored
Size3 MB25 MB
Age rating4+4+
DeveloperMizmovac, IncAdrien Brecheteau

Customer experience

Scale

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Scale Ratio

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews6 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

In-app purchases

None

Scale

No in-app purchases

1 purchases

Scale Ratio

One-time1
  • Delete Ads in the app$4.99

Questions

Is Scale free?
Scale costs $4.99, with no in-app purchases.
Is Scale Ratio free?
Scale Ratio is free to download, with in-app purchases available.
Which has better reviews, Scale or Scale Ratio?
Scale is rated higher. Scale averages 4.2 out of 5 from 5 ratings, while Scale Ratio averages 3.7 from 3 ratings.
Do Scale or Scale Ratio have ads?
Neither Scale nor Scale Ratio shows ads.
Which is updated more often, Scale or Scale Ratio?
Scale ships an update every 8 days, and Scale Ratio fortnightly. Most recently, Scale was updated on October 24, 2026 and Scale Ratio on October 24, 2026.

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