Comparison

Multiplier vs OrthoQuant MD

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Multiplier

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.

Highlights
  • Predict mature height
  • Calculate bone length
  • Assess limb length discrepancy
  • Analyze growth remaining
  • Plot height on CDC charts
  • Scanogram calculations
  • Foot length analysis
Features
Read full 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 (http://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 · Foot Height · Foot Height 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 the International Center for Limb Lengthening apps. The Multiplier app does not collect, use, or distribute any data from the users.

About

OrthoQuant MD

Features
Read full description

OrthoQuant MD is a professional clinical measurement tool designed for orthopedic surgeons, physical therapists, radiologists, and medical professionals. Designed for precision and speed, it allows you to perform complex measurements directly on clinical images. Key Features: AI Assistance: Ask AI to interpret your findings. Powerful Measuring Tools: Measure angles, distances, circular radii, and polygon areas with specialized interactive tools. Calibration Mode: Set a reference scale (mm) to ensure 100% accurate distance and radius measurements on any image. Smart Zoom 2.0: Place measurement points with millimeter precision using 2.2x magnifier support. Template Library: Ready-to-use orthopedic templates optimized for foot, ankle, knee, hip, spine, shoulder, hand, and elbow (HVA, Q-Angle, Cobb angle, etc.). Professional Organization: Organize your measurements into patient-based folders and track clinical history (PRO). Flexible Import: HEIC support and Drag & Drop ease for iPad/macOS. PDF Reporting: Create professional PDF reports containing measurement results and clinical notes. Privacy First: All data is stored locally on your device; you have full control over your clinical data. Streamline your clinical workflow and maximize your measurement accuracy with OrthoQuant MD. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Multiplier4 screens
OrthoQuant MD4 screens

Verdict

The call

The clearest difference is in-app purchases: Multiplier at none against OrthoQuant MD's 2. Multiplier also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. OrthoQuant MD sells 2 in-app purchases, starting at $1.99 per month. Multiplier asks for nothing beyond the download.

UpkeepUpdate frequency

Multiplier ships an update every 6 months, OrthoQuant MD every 3 months. The most recent releases landed on October 23, 2026 and October 28, 2026 respectively.

Scorecard2 real differences · 8 level
Multiplier versus OrthoQuant MD: the parameters behind the verdict, then further details
ParameterMultiplierOrthoQuant MD
PriceFreeFree
Rating4.6 (24 ratings) — better—
Positive reviews83.3% of reviews—
Number of ratings24 — better—
Update frequencyEvery 6 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS13.0 — better15.0
Further details — not scored
Size62 MB49 MB
Age rating12+17+
DeveloperLifeBridge HealthILKER EREN

In-app purchases

None

Multiplier

No in-app purchases

2 purchases

OrthoQuant MD

Subscriptions2
  • OrthoQuant MD Pro$1.991 Month
  • OrthoQuant MD Pro$19.991 Year

Questions

Is Multiplier free?
Multiplier is free to download, with no in-app purchases.
Is OrthoQuant MD free?
OrthoQuant MD is free to download, with in-app purchases available.
Do Multiplier or OrthoQuant MD have ads?
Neither Multiplier nor OrthoQuant MD shows ads.
Which is updated more often, Multiplier or OrthoQuant MD?
Multiplier ships an update every 6 months, and OrthoQuant MD every 3 months. Most recently, Multiplier was updated on October 23, 2026 and OrthoQuant MD on October 28, 2026.

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