Multiplier

Multiplier

Predict height & bone length

24 ratings
30 reviews
Free

Details

  • Released
  • Updated
  • September 2, 2011
  • July 2, 2026

Features

Multiplier screenshot #1 for iPhone
Multiplier screenshot #2 for iPhone
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Multiplier screenshot #4 for iPhone
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About

This app automates complex calculations for predicting mature height, bone length, and limb length discrepancies in children. It simplifies manual methods, reducing calculation time and errors for various orthopedic and growth-related assessments.

Predict mature height
Calculate bone length
Assess limb length discrepancy
Analyze growth remaining
Plot height on CDC charts
Scanogram calculations
Foot length analysis
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What's New in Multiplier

10.0

July 2, 2026

Thank you for using Multiplier! This updated version introduces several exciting enhancements. The redesigned interface offers continuous access to frequently used features, along with a new Foot Height and Foot Height Discrepancy calculator. We'd like to thank Dr. Raymond Liu and his team for helping us with these calculations. To users who are attending our annual Baltimore Limb Deformity Course, Dr. John Herzenberg will be demonstrating what the new Multiplier has to offer. We hope you enjoy!

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User reviews

Multiplier the best app for providers!

This app is easy to use, simple and fast In a few seconds I can answer all the questions parents will ask about the predicted height and leg length discrepancy!

Essential app for peds ortho

This app is imperative for anyone treating limb length discrepancies in the growing child. It can be used to predict final discrepancy magnitude, time epiphysiodeses, predict adult height, and provide an immense amount of clinically pertinent information for patients and providers alike. It comes from pioneers and household names in the field of deformity management, and I would absolutely recommend it to anyone seeing these patients!
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The best for limb length discrepancy calculation!

This is, without a doubt, the absolute best app for anyone who sees patients with limb length discrepancies. Easy to use, reliable, and based on established data.

There is also a wonderful tutorial (on VuMedi) to understand how to use it.

This is a game changer in a busy clinic!

Awesome app

Can’t live without it in my practice!! Honestly, a must have app for any pediatric orthopedic surgeon.

Fantastic update!

Very useful update to an already critical App for pedipods. The new bone age section for hand x-Rays is simple to use and efficient. The new CDC growth chart option makes it easy to share graphically displayed data with parents. Thanks for these new tools!

Developer apps

FAQ

What does the Multiplier app do?

The Multiplier app automates complex calculations to predict a child's mature height, bone length, and assess limb length discrepancies. It simplifies manual methods used in pediatric orthopedics and growth assessments, reducing calculation time and potential errors.

What are the key features of the Multiplier app?

Key features include calculations for limb length discrepancy (congenital and developmental), growth remaining, bone length, timing of angular correction and epiphyseodesis, scanogram calculations, height prediction at maturity, and plotting height on CDC growth charts. It also offers specific calculations for achondroplasia, fetal growth, foot length, spine growth, and oblique plane deformities.

How much does the Multiplier app cost?

The Multiplier app is a paid application. The provided data indicates it does not have in-app purchases or ads, suggesting a one-time purchase for full access to its features.

Is the Multiplier app accurate?

While the app automates calculations based on established methods, no growth prediction method is 100% accurate. The app is intended to assist clinical judgment, not replace it. It provides tools for precise calculations that can aid in diagnosis and treatment planning.

Who is the target audience for the Multiplier app?

The app is designed for healthcare professionals, particularly those specializing in pediatrics and orthopedics, such as pediatricians, orthopedic surgeons, and clinicians involved in assessing and managing child growth and limb development.