iPhone Screenshots


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.

What’s New

Version 1.3.0

Dark Mode Support (with other minor visual improvements)

Click the Version History button to review what's new with the prior versions.

Ratings and Reviews

5.0 out of 5
4 Ratings

4 Ratings

rtc777 ,

Does the job!

Thanks for making this app. It’s a big time saver!

Developer Response ,

Thank you for using the app! Saving time and helping you is our goal!

Limey John ,

I use this for all my modeling projects

Fun and useful

Developer Response ,

Thanks! I'm glad that the app is helping out with your projects. I appreciate your support!


Mizmovac, Inc
98.5 MB

Requires iOS 11.2 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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