Comparison

CJOrtho vs CupCalc

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

Head to head
About

CJOrtho

This medical app assists orthopedic surgeons and health professionals in managing patients with musculoskeletal disorders. It offers tools for clinical evaluation, decision support, and pre- and post-operative follow-up, including classifications, clinical scores, and a goniometer.

Highlights
  • Orthopedic classifications
  • Clinical scores by joint
  • Goniometer tool
  • Patient database
  • Procedure progress tracking
  • Pre- and post-operative follow-up
Features
Read full description

CJOrtho is an application for orthopedic surgeons and health professionals treating musculoskeletal disorders. Developed by the College of Young Orthopedists, it represents a decision support and management of patients consulting for a musculoskeletal disorder. It also facilitates clinical evaluation and pre- and post-operative follow-up. The application includes five tools: β€’ The classifications most frequently used in Orthopedics Traumatology; β€’ The main clinical scores per joint for the follow-up of your patients; β€’ A goniometer; β€’ A database for keeping patient information and linking it to the other tools in the application; β€’ A portfolio for tracking progress by categorizing procedures as observed, performed, or not yet encountered. The College of Young Orthopedists www.cjortho.fr/site/ Feel free to send us your comments to make this app always more useful.

About

CupCalc

Features
Read full description

CupCalc β€” Spinopelvic Planning Reference CupCalc is an educational reference calculator for orthopaedic surgeons and trainees performing total hip arthroplasty. It applies published mathematical formulas to compute mobility-specific acetabular cup targets based on pelvic incidence, sacral slope, and femoral mobility classification. The calculations in CupCalc are derived entirely from peer-reviewed literature. No proprietary algorithms. No black-box outputs. Every number traces back to a published source β€” accessible within the app. What CupCalc calculates: β€” Functional anteversion and inclination targets referenced to either the anterior pelvic plane or standing AP radiograph β€” Standing and sitting sacral slope with delta sacral slope mobility classification β€” Pelvic femoral angle (standing and sitting) β€” Anterior pelvic tilt correction for anatomic landmark guidance β€” Safe zone plot with CSI thresholds β€” Exportable PDF planning summary with full reference list Built on the published work of: Bodner, Dorr, Heckmann, Stefl, Kanawade, Wan, and colleagues whose research established the framework for functional spinopelvic planning in THA. For Fellows: CupCalc is free for 12 months for active arthroplasty fellows through the Fellow Access program. Apply within the app β€” program verification is handled automatically via e-mail. Privacy: CupCalc does not collect, store, or transmit protected health information. Do not enter patient-identifying information into any field. Anonymous case labels only. CupCalc is an educational reference tool intended for use by qualified medical professionals. It performs published mathematical formulas and presents results for independent professional evaluation. It does not provide surgical recommendations, replace clinical judgment, or constitute medical advice. Not a medical device. Not cleared by the FDA. All clinical decisions remain the sole responsibility of the treating surgeon. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

CJOrtho4 screens
CupCalc4 screens

Verdict

The call

The clearest difference is in-app purchases: CJOrtho at none against CupCalc's 2. CupCalc's advantage is update cadence (fortnightly vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. CupCalc sells 2 in-app purchases, starting at $12.99 per year. CJOrtho asks for nothing beyond the download.

UpkeepUpdate frequency

CJOrtho ships an update every 6 months, CupCalc fortnightly. The most recent releases landed on September 15, 2026 and September 20, 2026 respectively.

Scorecard2 real differences Β· 6 level
CJOrtho versus CupCalc: the parameters behind the verdict, then further details
ParameterCJOrthoCupCalc
PriceFreeFree
Positive reviews75.0% of reviewsβ€”
Update frequencyEvery 6 monthsFortnightly β€” better
AdsNoNo
In-app purchasesNo β€” betterYes
MonetizationFreeβ€”
DevicesiPhone, iPadiPhone, iPad, iPod β€” better
Requires iOS16.015.1 β€” better
Further details β€” not scored
Size72 MB42 MB
Age rating17+4+
DeveloperCollège des Jeunes OrthopédistesZekko LLC

In-app purchases

None

CJOrtho

No in-app purchases

2 purchases

CupCalc

Subscriptions2
  • CupCalc Express1 Year trial$12.991 Year
  • CupCalc Pro1 Year trial$19.991 Year

Questions

Is CJOrtho free?
CJOrtho is free to download, with no in-app purchases.
Is CupCalc free?
CupCalc is free to download, with in-app purchases available.
Do CJOrtho or CupCalc have ads?
Neither CJOrtho nor CupCalc shows ads.
Which is updated more often, CJOrtho or CupCalc?
CJOrtho ships an update every 6 months, and CupCalc fortnightly. Most recently, CJOrtho was updated on September 15, 2026 and CupCalc on September 20, 2026.

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