Multiplier vs The Arthrex Surgeon App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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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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.
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.
- HD surgical technique videos
- Extensive digital orthopedic knowledge library
- Offline content access
- Optimized for iPad and iPhone
- Intuitive filtering and organization
- Cloud video streaming
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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.
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Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
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.
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.
| Parameter | Multiplier | The Arthrex Surgeon App |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (24 ratings) | 4.8 (29 ratings) — better |
| Positive reviews | 83.3% of reviews | 87.5% of reviews — better |
| Number of ratings | 24 | 29 — better |
| Update frequency | Every 6 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 62 MB | 43 MB |
| Age rating | 12+ | 17+ |
| Developer | LifeBridge Health | Arthrex, Inc. |
Customer experience
Multiplier
The Arthrex Surgeon App
In-app purchases
Multiplier
No in-app purchases
The Arthrex Surgeon App
No in-app purchases
Questions
Is Multiplier free?
Is The Arthrex Surgeon App free?
Which has better reviews, Multiplier or The Arthrex Surgeon App?
Do Multiplier or The Arthrex Surgeon App have ads?
Which is updated more often, Multiplier or The Arthrex Surgeon App?
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