# Multiplier

> Automates calculations to predict mature height and bone length in children.

Canonical page: [https://chrome-stats.com/d/com.sinai](https://chrome-stats.com/d/com.sinai)

## Overview

- **ID:** `com.sinai`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Sinai Hospital of Baltimore, Inc.
- **Category:** MEDICAL
- **Downloads:** 35,907
- **Rating:** 3.00 / 5 (196 ratings)
- **Version:** 7.1
- **Last updated:** 2020-01-14
- **First published:** 2011-08-25
- **Publisher country:** US
- **Size:** 54 MB
- **Data as of:** 2026-09-06
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.sinai)
- **Website:** [http://www.limblength.org](http://www.limblength.org/)
- **Privacy policy:** [https://www.limblength.org/about-us/physician-education/multiplier-mobile-app/](https://www.limblength.org/about-us/physician-education/multiplier-mobile-app/)

## Description

**Multiplier** is an advanced Chrome extension designed to automate complex calculations predicting mature height and bone length in children. Developed at the University of Maryland and further refined at the International Center for Limb Lengthening, this tool reduces manual errors and saves time by applying specialized formulae based on user input such as sex, age, and bone length.

Key features include calculations for lower and upper extremity limb length discrepancies, growth remaining, timing for angular corrections, and epiphysiodesis. The app supports diverse assessments including CDC growth chart plotting, achondroplasia measurements, fetal bone length estimates, foot length analysis, and spine sitting height predictions. Additionally, it offers educational resources like bone age determination via radiographs, standardized limb measurements, detailed multiplier formulae, and deformity correction planning using the Solomin Foot Analysis.

Ideal for orthopedic specialists and clinicians, Multiplier ensures precise, swift evaluations to aid clinical judgment in pediatric limb and growth assessments. It prioritizes user privacy without collecting personal data, though it should complement—not replace—expert medical evaluation and judgment.

## Rankings

- #342,832 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.ACCESS_WIFI_STATE`
- `android.permission.INTERNET`
- `android.permission.READ_EXTERNAL_STORAGE`
- `android.permission.WRITE_EXTERNAL_STORAGE`

## Review summary

Users appreciate the app for its accurate height prediction and usefulness in clinical and family settings, especially for managing limb length discrepancies. It provides valuable tools that simplify growth tracking and intervention planning. However, multiple users face difficulties entering birthdates due to a cumbersome scrolling interface and lack of number input options. Additionally, crashes and app malfunctions following updates are common complaints. While many find it convenient and easy to use, some express dissatisfaction with inconsistent predictions and technical issues after software updates.

### Pros

- Accurate and useful height predictor, making it easy and fun to use especially in family or clinical settings.
- Facilitates growth charting and management of limb length discrepancies (LLDs), aiding in patient counseling and intervention timing.
- Easy to use and a convenient tool compared to manual calculations, saving time and effort.
- Provides a variety of valuable tools related to growth prediction and clinical management.

### Cons

- Difficult date of birth entry due to lack of direct typing or number switching; users must scroll extensively to input birthdate.
- App crashes or stops working after certain updates, particularly after the Lollipop update or recent updates mentioned by users.
- Some users report inconsistent or inaccurate height predictions, leading to frustration.
- App sometimes fails to open or function properly after updates.

## Similar extensions and apps

- [Multiplier](https://chrome-stats.com/d/com.MultiplierApp) — 4,583 users
- [Paley Growth Multipliers](https://chrome-stats.com/d/com.paley.paleygrowth) — 1,499 users
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- [Calculate Multi](https://chrome-stats.com/d/com.calculate.calculatemulti) — 25 users
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- [Bone age](https://chrome-stats.com/d/es.jshcd.edadosea) — 190,845 users
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- [TallMate: Height Increase](https://chrome-stats.com/d/app.tallmate.tallmate) — 38,585 users, 4.29 / 5
- [Easy Age](https://chrome-stats.com/d/insidetechnology.easyage) — 10,533 users

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.sinai)