---
title: "Multiplier - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "-The Multiplier App automates calculations to predict mature height and bone length in children. This method was created originally in Baltimore at the University of Maryland, and subsequently develop"
---

# Multiplier — United States
> Predict height & bone length

![Multiplier App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/17/6c/e1/176ce15f-5f7b-b6f9-1626-f001aee59ff9/AppIcon-0-0-1x_U007epad-0-1-85-220.png/434x0w.png)

**Developer:** [LifeBridge Health](https://apptail.io/developer/lifebridge-health-Ykxb)
**Category:** Medical
**Rating:** 4.6/5 (24 ratings)
**Price:** Free
**Bundle ID:** com.MultiplierApp
**Store:** Apple App Store
**Country:** United States
**Version:** 10.0 (released 2026-07-02)
**Original Release:** 2011-09-02
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id460335161)
**AppTail Page:** [https://apptail.io/app/multiplier-VCb/united-states](https://apptail.io/app/multiplier-VCb/united-states)

## Multiplier Description
-The Multiplier App automates calculations to predict mature height and bone length in children. This method was created originally in Baltimore at the University of Maryland, and subsequently developed at the International Center for Limb Lengthening (ICLL), Rubin Institute for Advanced Orthopedics (RIAO), Sinai Hospital of Baltimore.


-We have taught the Multiplier Method for more than 19 years at our annual Baltimore Limb Deformity Course (www.DeformityCourse.com). These calculations are typically performed by hand, using various formulae. Certain calculations are easy, but others involve more complicated formulae. Utilizing this app will reduce the time needed for these routine calculations and decrease errors. You need only input certain data (sex, age, length) and the app will calculate the answer by using the appropriate Multiplier formula.


The Multiplier App will allow you to make the following calculations:

• Lower Extremity
- Limb Length Discrepancy (LLD) (Congenital)
- LLD (Developmental)
- Growth Remaining
- Bone Length
- Timing of Angular Correction
- Timing of Epiphysiodesis
- Comprehensive (Congenital) LLD and Epiphysiodesis
-Scanogram Calculations (calculates femur/tibia lengths, overall limb length discrepancy, and amount/side of femur/tibia discrepancies)

• Upper Extremity
- LLD (Congenital)
- LLD (Developmental)
- Growth Remaining
- Bone Length

• Height and CDC Growth Charts (calculates height at maturity, calculates height at every age, and plots the patient’s height and weight on the CDC growth charts)

• Achondroplasia
- Height
- Sitting Height
- Leg Length

• Fetus (calculates the length of tibia or femur at birth and maturity)

• Foot
- Foot Length
- Foot Length Discrepancy

• Spine (calculates sitting height at maturity)

• Oblique Plane Deformity (calculates magnitude, orientation, and direction of an oblique plane deformity)

• Inclined Osteotomy (calculates the rotational orientation and the vertical inclination of the osteotomy)

This app also provides the following additional resources:
-Bone Age: Elbow and Hand (shows how to determine skeletal age by using radiographs of the elbow or hand)
-Figures that show the standard measurements for the lower limb and foot
-The multiplier formulae that the app uses to perform the calculations
-Tables that show the multiplier values that are used in the formulae
-Figures that show the Solomin Foot Analysis (deformity correction planning for the midfoot, hindfoot, and ankle using reference lines and angles provided by Dr. Leonid Solomin)
-Figures that show the development of the apophyses, epiphyses, and bones
-Bibliography
-User guide


Disclaimer: No growth prediction method is 100% accurate; this App is not a substitute for sound and careful clinical judgment.
Privacy Policy: We respect the privacy of the people who use International Center for Limb Lengthening apps. The Multiplier app does not collect, use or distribute any data from the users.

## Multiplier Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/44/72/2e/44722e77-ef11-a590-cb67-23fd7407b606/d6d571ca-1c75-4b47-8f58-bec48decca52_Screenshot_2024-04-15_at_10.34.27_U202fAM.jpeg/1242x2688.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/29/e6/93/29e693da-aaba-8534-1bb0-a067670512cd/5f0d4c3f-53d7-4674-9e95-be363d1fe3db_Screenshot_2024-04-15_at_10.36.09_U202fAM.jpeg/1242x2688.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/3a/ad/e2/3aade276-5daf-cb04-6eae-8fdde6f443df/ef18326d-7e76-4c7b-817f-557781a48628_Screenshot_2024-04-15_at_10.37.12_U202fAM.jpeg/1242x2688.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/40/54/37/40543759-46e1-c1d5-debc-173bd4c0892a/1855dd0b-7443-4376-ae13-064b741dcbe1_Screenshot_2024-04-15_at_10.29.29_U202fAM.jpeg/1242x2688.png)

## Multiplier Rating Breakdown in United States
- 5 stars: 18 (75%)
- 4 stars: 5 (21%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 1 (4%)

## Multiplier Reviews in United States

### ***** "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!
-- alexinpeds, 2022-07-07

### ***** "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!
-- CG083116, 2022-02-21

### ***** "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!
-- FP2018Eng, 2020-12-05

### ***** "Awesome app"
Can’t live without it in my practice!! Honestly, a must have app for any pediatric orthopedic surgeon.
-- taltano, 2020-01-07

### ***** "Growth"
Help me to get taller and bigger faster
-- Heir K, 2018-10-13

### ***** "Essential tool for pediatric orthopaedic surgeons"
This is an invaluable tool for practicing pediatric orthopaedic surgeons developed by Drs. Herzenberg and Paley - a must-have free download for all orthopaedic residents and orthopaedic surgeons.
-- Plato Party, 2018-08-26

### ***** "Lots of fun! Fairly consistent. Hope it's accurate!"
I've had this app for several years. I have been tracking both of my daughters and the predictions have been fairly consistent throughout the years. I recently started tracking my infant son as well and I hope the predictions are correct, although I won't know for several years. I am very short and my husband is tall, so it's fun to use this for an idea of how tall my children will grow. Side note: I only use the height predictor. I have not tried the other functions.
-- Momalie, 2017-01-29

### ***** "Quick and well designed"
As a pediatric orthopedist with a focus in deformity correction, I find this app to be an excellent resource.  Within the limits of the data on which the program is based, I have not found a better resource.  Excellent for quick teaching and calculations in the office setting.
-- Pedi-pod, 2016-09-12

### ***** "Useful easy-to-use app"
Very clinically useful app - can be easily used in the middle of a busy clinic to calculate limb length discrepancy, growth remaining, timing of epiphysiodesis and much more; very helpful resources in "Additional resources" for bone age, normal joint angles and oblique plane deformity calculations. Growth charts are great to show parents. Highly recommend.
-- Peds ortho, 2016-09-04

### ***** "great app"
Great for use in the Peds Ortho clinic for kids with LLD, graphs help to explain growth to parents
-- ortho res, 2016-02-18

[View all Multiplier reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)


## Multiplier Store Rankings
| Chart | Country | Category | Rank |
|-------|---------|----------|------|
| Top Free | Lebanon | Medical | #123 |

## Multiplier Discovered Keywords
- multiplier

## Apps Similar to Multiplier
- [myAO](https://apptail.io/app/myao-NVc/united-states)
- [AO Trauma Orthogeriatrics](https://apptail.io/app/ao-trauma-orthogeriatrics-JOO/united-states)
- [Bullets*](https://apptail.io/app/bullets-KOO/united-states)
- [Implant Identifier](https://apptail.io/app/implant-identifier-NOO/united-states)
- [Membership App - AAOS](https://apptail.io/app/membership-app-aaos-Wrtb/united-states)
- [AAOS Annual Meeting](https://apptail.io/app/aaos-annual-meeting-VYWb/united-states)
- [AONA Events](https://apptail.io/app/aona-events-bRCc/united-states)
- [RockLake RLEP](https://apptail.io/app/rocklake-rlep-nhxd/united-states)
- [What's the Skeletal Maturity?](https://apptail.io/app/whats-the-skeletal-maturity-Chxd/united-states)
- [HipScreen](https://apptail.io/app/hipscreen-Hyne/united-states)

## Multiplier Available In
- [United States](https://apptail.io/app/multiplier-VCb/united-states)
- [United Kingdom](https://apptail.io/app/multiplier-VCb/united-kingdom)
- [Canada](https://apptail.io/app/multiplier-VCb/canada)
- [Israel](https://apptail.io/app/multiplier-VCb/israel)
- [Netherlands](https://apptail.io/app/multiplier-VCb/netherlands)
- [Brazil](https://apptail.io/app/multiplier-VCb/brazil)
- [Sweden](https://apptail.io/app/multiplier-VCb/sweden)
- [Japan](https://apptail.io/app/multiplier-VCb/japan)
- [Türkiye](https://apptail.io/app/multiplier-VCb/turkey)
- [South Korea](https://apptail.io/app/multiplier-VCb/south-korea)
- [Spain](https://apptail.io/app/multiplier-VCb/spain)
- [India](https://apptail.io/app/multiplier-VCb/india)
- [Mexico](https://apptail.io/app/multiplier-VCb/mexico)
- [Austria](https://apptail.io/app/multiplier-VCb/austria)
- [Chile](https://apptail.io/app/multiplier-VCb/chile)
- [Dominican Republic](https://apptail.io/app/multiplier-VCb/dominican-republic)
- [Algeria](https://apptail.io/app/multiplier-VCb/algeria)
- [Ecuador](https://apptail.io/app/multiplier-VCb/ecuador)
- [Estonia](https://apptail.io/app/multiplier-VCb/estonia)
- [Egypt](https://apptail.io/app/multiplier-VCb/egypt)
- [Finland](https://apptail.io/app/multiplier-VCb/finland)
- [France](https://apptail.io/app/multiplier-VCb/france)
- [Greece](https://apptail.io/app/multiplier-VCb/greece)
- [Hong Kong SAR China](https://apptail.io/app/multiplier-VCb/hong-kong)
- [Croatia](https://apptail.io/app/multiplier-VCb/croatia)
- [Hungary](https://apptail.io/app/multiplier-VCb/hungary)
- [Indonesia](https://apptail.io/app/multiplier-VCb/indonesia)
- [Ireland](https://apptail.io/app/multiplier-VCb/ireland)
- [Iceland](https://apptail.io/app/multiplier-VCb/iceland)
- [Italy](https://apptail.io/app/multiplier-VCb/italy)
- [Kuwait](https://apptail.io/app/multiplier-VCb/kuwait)
- [Kazakhstan](https://apptail.io/app/multiplier-VCb/kazakhstan)
- [Lebanon](https://apptail.io/app/multiplier-VCb/lebanon)
- [Sri Lanka](https://apptail.io/app/multiplier-VCb/sri-lanka)
- [Lithuania](https://apptail.io/app/multiplier-VCb/lithuania)
- [Malaysia](https://apptail.io/app/multiplier-VCb/malaysia)
- [Nigeria](https://apptail.io/app/multiplier-VCb/nigeria)
- [Norway](https://apptail.io/app/multiplier-VCb/norway)
- [New Zealand](https://apptail.io/app/multiplier-VCb/new-zealand)
- [Peru](https://apptail.io/app/multiplier-VCb/peru)
- [Philippines](https://apptail.io/app/multiplier-VCb/philippines)
- [Pakistan](https://apptail.io/app/multiplier-VCb/pakistan)
- [Poland](https://apptail.io/app/multiplier-VCb/poland)
- [Portugal](https://apptail.io/app/multiplier-VCb/portugal)
- [Romania](https://apptail.io/app/multiplier-VCb/romania)
- [Russia](https://apptail.io/app/multiplier-VCb/russia)
- [Saudi Arabia](https://apptail.io/app/multiplier-VCb/saudi-arabia)
- [Singapore](https://apptail.io/app/multiplier-VCb/singapore)
- [Slovenia](https://apptail.io/app/multiplier-VCb/slovenia)
- [Thailand](https://apptail.io/app/multiplier-VCb/thailand)
- [Tunisia](https://apptail.io/app/multiplier-VCb/tunisia)
- [Taiwan](https://apptail.io/app/multiplier-VCb/taiwan)
- [Ukraine](https://apptail.io/app/multiplier-VCb/ukraine)
- [Uzbekistan](https://apptail.io/app/multiplier-VCb/uzbekistan)
- [Vietnam](https://apptail.io/app/multiplier-VCb/vietnam)
- [United Arab Emirates](https://apptail.io/app/multiplier-VCb/united-arab-emirates)
- [South Africa](https://apptail.io/app/multiplier-VCb/south-africa)
- [Armenia](https://apptail.io/app/multiplier-VCb/armenia)
- [Argentina](https://apptail.io/app/multiplier-VCb/argentina)
- [Australia](https://apptail.io/app/multiplier-VCb/australia)
- [Azerbaijan](https://apptail.io/app/multiplier-VCb/azerbaijan)
- [Belgium](https://apptail.io/app/multiplier-VCb/belgium)
- [Bahrain](https://apptail.io/app/multiplier-VCb/bahrain)
- [Brunei](https://apptail.io/app/multiplier-VCb/brunei)
- [Belarus](https://apptail.io/app/multiplier-VCb/belarus)
- [Switzerland](https://apptail.io/app/multiplier-VCb/switzerland)
- [China](https://apptail.io/app/multiplier-VCb/china)
- [Colombia](https://apptail.io/app/multiplier-VCb/colombia)
- [Czechia](https://apptail.io/app/multiplier-VCb/czechia)
- [Germany](https://apptail.io/app/multiplier-VCb/germany)
- [Denmark](https://apptail.io/app/multiplier-VCb/denmark)

---

## About AppTail

[AppTail](https://apptail.io) is a mobile app intelligence platform providing app analytics, ASO (App Store Optimization) tools, keyword tracking, competitor analysis, revenue estimates, and review monitoring for iOS App Store apps. Track your app's performance, discover ranking keywords, monitor competitors, and analyze market trends.

- [Search Apps](https://apptail.io)
- [Top Charts](https://apptail.io/top-iphone-apps)
- [Sign Up for Full Access](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=footer)

*Data provided by [AppTail](https://apptail.io) - Mobile App Intelligence Platform*