Model Scaler vs Scale
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Model Scaler
This tool instantly converts measurements between U.S. Customary and Metric units for any modeling scale. It's designed to be fast, easy, and efficient for all types of scale modelers.
- Instant scale conversion
- U.S. Customary to Metric
- Metric to U.S. Customary
- Supports any modeling scale
- Fast and efficient
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Instant scale conversion tool for any modeling scale. Fast, easy and efficient scale model conversion. Quickly convert U.S. Customary and Metric measurements into any scale. Perfect for all scale modelers, railroad modelers and tabletop gamers.
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.
- Extensive database of scales and units
- Customizable scales and units
- Imperial and metric conversions
- Fractional and decimal rounding
- Conversion history
- Customizable buttons
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Build models and scaled objects quicker and with more accuracy using Scale-o-Tron. Model builders, architects, board gamers, doll makers, train enthusiasts, sculptors, set designers, and anyone else that builds things to scale can focus on their craft and art rather than spending time on conversions and calculations. Scale-o-Tron features a large database of preprogrammed scales, measurement units and conversions so that you can work in the scale and system that’s best for your model. The calculator can also be easily customized to accommodate your workflow. Also, there are no ads or tracking. Features include: • 100 commonly used scales organized into categories. You can also create your own scales and store them for quick access. • Measurement units in imperial and metric, including many historical units (handy if you reference old schematics or literature). • Seamless and easy conversion between scales, units, or both. Scale up or down. • Fractional and decimal rounding. A huge time saver when building for accuracy. You control the rounding resolution. • Your last 100 conversions and calculations are stored for quick access. • Fractions are easy to input and you determine the best display format for your workflow. • Customizable buttons make the calculator work the way you want it to. • Scaling and unit conversions can be switched on and off easily. Use Scale-o-Tron like a standard calculator, if you wish. • Memory functions • Backspace key If you're building from scratch or adding scale objects to your model, Scale-o-Tron can help. It’s the calculator for makers. Reach us at support@mizmovac.com for questions or feedback.
Screenshots
Verdict
The clearest difference is price: Model Scaler at Free against Scale's $2.99. Model Scaler also leads on ratings volume (12 vs 4) and iOS requirement (9.0 vs 12.0). Scale's advantage is rating (5.0 vs 2.9) and update cadence (every 8 days vs every 6 months). On ads, in-app purchases and device support 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
Model Scaler is free to download; Scale costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Scale holds the better App Store score, 5.0 against 2.9. Both are backed by a comparable volume of ratings — 12 and 4 respectively. Written reviews point the same way: 40% of Model Scaler's written reviews are positive against 67% of Scale's.
Model Scaler ships an update every 6 months, Scale every 8 days. The most recent releases landed on June 11, 2026 and June 1, 2026 respectively.
| Parameter | Model Scaler | Scale |
|---|---|---|
| Price | Free — better | $2.99 |
| Rating | 2.9 (12 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 40.0% of reviews | 66.7% of reviews — better |
| Number of ratings | 12 — better | 4 |
| Update frequency | Every 6 months | Every 8 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 11 MB | 58 MB |
| Age rating | 4+ | 4+ |
| Developer | Woodland Scenics | Mizmovac, Inc |
Customer experience
Model Scaler
Scale
In-app purchases
Model Scaler
No in-app purchases
Scale
No in-app purchases









