Multiplier vs CPUP Hip Score
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.
CPUP Hip Score
This medical tool calculates the CPUP Hip Score, a metric used in a national quality register for individuals with cerebral palsy. It aims to optimize function and quality of life by preventing hip dislocation and contractures. The app provides background information and references to relevant scientific studies.
- CPUP Hip Score calculator
- Background information on CPUP
- Details on CPUP Hip Score variables
- References to scientific studies
- National quality register data
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CPUP is a follow-up program and national quality register for people with cerebral palsy (CP). The program was initiated in southern Sweden in 1994 and since 2007 all of Sweden is engaged. The purposes of CPUP are: to prevent the occurrence of hip dislocation and severe contractures thereby optimizing function and increasing the quality of life for people with CP. to increase knowledge about CP and the effects of various treatment interventions. to increase collaboration between different professionals working with people with CP. The app contains a calculator to calculate CPUP Hip Score, background information on CPUP and the four variables in CPUP Hip Score, as well as references to the (own) scientific studies created CPUP Hip Score. The app is only aimed at the medical profession.
Screenshots
Verdict
The clearest difference is monetization model: CPUP Hip Score at free against Multiplier's paid. CPUP Hip Score also leads on rating (5.0 vs 4.6) and iOS requirement (8.0 vs 13.0). Multiplier's advantage is ratings volume (24 vs 1). On price, update cadence, ads and in-app purchases 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.
CPUP Hip Score holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Multiplier has 24 ratings behind it against 1, so its average is the more settled of the two.
Multiplier ships an update every 6 months, CPUP Hip Score every 3 months. The most recent releases landed on October 23, 2026 and September 14, 2026 respectively.
| Parameter | Multiplier | CPUP Hip Score |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (24 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 83.3% of reviews | — |
| Number of ratings | 24 — better | 1 |
| Update frequency | Every 6 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 8.0 — better |
| Further details — not scored | ||
| Size | 62 MB | 17 MB |
| Age rating | 12+ | 17+ |
| Developer | LifeBridge Health | Gunnar Hagglund |
Customer experience
Multiplier
CPUP Hip Score
In-app purchases
Multiplier
No in-app purchases
CPUP Hip Score
No in-app purchases
Questions
Is Multiplier free?
Is CPUP Hip Score free?
Which has better reviews, Multiplier or CPUP Hip Score?
Do Multiplier or CPUP Hip Score have ads?
Which is updated more often, Multiplier or CPUP Hip Score?
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