Comparison

Multiplier vs The Arthrex Surgeon App

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

The Arthrex Surgeon App

Access a comprehensive digital library of orthopedic knowledge and surgical resources on your mobile device. Stream HD technique videos and browse extensive content offline, organized logically for quick discovery.

Highlights
  • HD surgical technique videos
  • Extensive digital orthopedic knowledge library
  • Offline content access
  • Optimized for iPad and iPhone
  • Intuitive filtering and organization
  • Cloud video streaming
Features
Read full description

The Arthrex Surgeon App provides 24/7 mobile access to our extensive digital orthopedic knowledge and resource library. The app allows you to consume content online as well as offline. Key Features: HD surgical technique videos by leading surgeons Extensive digital orthopedic knowledge library Optimized for iPad and iPhone Video streaming from the cloud for improved performance and speed Logical content organization and labeling for easy browsing from broad to specific topics Intuitive filtering for faster information discovery Developed in close collaboration with leading orthopedic surgeons About Arthrex: Arthrex Inc. is a global leader in multi-specialty, minimally invasive surgical technology, medical research, manufacturing and medical education. Arthrex develops and releases more than 1,000 new products and procedures every year to advance minimally invasive orthopedics, trauma, spine and arthroplasty innovation worldwide, and specializes in the latest 4K multi-specialty surgical visualization and OR integration technology solutions.

Screenshots

Multiplier4 screens
The Arthrex Surgeon App3 screens

Verdict

The call

The clearest difference is monetization model: The Arthrex Surgeon App at free against Multiplier's paid. The Arthrex Surgeon App also leads on update cadence (monthly vs every 6 months). Multiplier's advantage is iOS requirement (13.0 vs 18.0). On price, rating, review sentiment and ratings volume 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

The Arthrex Surgeon App holds the better App Store score, 4.8 against 4.6. Both are backed by a comparable volume of ratings — 24 and 29 respectively. Written reviews point the same way: 83% of Multiplier's written reviews are positive against 88% of The Arthrex Surgeon App's.

UpkeepUpdate frequency

Multiplier ships an update every 6 months, The Arthrex Surgeon App monthly. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Multiplier versus The Arthrex Surgeon App: the parameters behind the verdict, then further details
ParameterMultiplierThe Arthrex Surgeon App
PriceFreeFree
Rating4.6 (24 ratings)4.8 (29 ratings) — better
Positive reviews83.3% of reviews87.5% of reviews — better
Number of ratings2429 — better
Update frequencyEvery 6 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better18.0
Further details — not scored
Size62 MB43 MB
Age rating12+17+
DeveloperLifeBridge HealthArthrex, Inc.

Customer experience

Multiplier

All ratings24 ratings
Positive95.8%
Neutral0.0%
Negative4.2%
Written reviews30 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

The Arthrex Surgeon App

All ratings29 ratings
Positive96.6%
Neutral0.0%
Negative3.4%
Written reviews8 reviews
Positive87.5%
Neutral0.0%
Negative12.5%

In-app purchases

None

Multiplier

No in-app purchases

None

The Arthrex Surgeon App

No in-app purchases

Questions

Is Multiplier free?
Multiplier is free to download, with no in-app purchases.
Is The Arthrex Surgeon App free?
The Arthrex Surgeon App is free to download, with no in-app purchases.
Which has better reviews, Multiplier or The Arthrex Surgeon App?
The Arthrex Surgeon App is rated higher. Multiplier averages 4.6 out of 5 from 24 ratings, while The Arthrex Surgeon App averages 4.8 from 29 ratings.
Do Multiplier or The Arthrex Surgeon App have ads?
Neither Multiplier nor The Arthrex Surgeon App shows ads.
Which is updated more often, Multiplier or The Arthrex Surgeon App?
Multiplier ships an update every 6 months, and The Arthrex Surgeon App monthly. Most recently, Multiplier was updated on October 23, 2026 and The Arthrex Surgeon App on October 24, 2026.

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