AO Surgery Reference vs CJOrtho
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
AO Surgery Reference
Access a comprehensive online repository of surgical knowledge for fracture management. It provides detailed guidance on diagnosis, treatment, and aftercare for numerous fracture types, supported by extensive illustrations and expert review.
- 353 fracture types covered
- 172 surgical approaches
- 1222 surgical procedures
- Over 30,000 illustrations
- Feline, canine, and equine fracture care
- Powerful search function
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QUICK ONLINE REFERENCE IN CLINICAL LIFE Gain easy access to the award-winning AO Surgery Reference. AO Surgery Reference is an online repository for surgical knowledge. It describes the complete surgical management process from diagnosis to aftercare for all fractures of a given anatomical region, and also assembles relevant material that the AO has published before. It gives access to: • aid in surgical decision making for 353 fracture types • 172 approaches • 1222 surgical procedures • all richly illustrated with more than 30'000 Illustrations and much more. To ensure the quality of the content, it is authored, edited, and peer reviewed by experienced AO Faculty from all over the world, some of which are also well-known textbook authors/editors. This is a relaunch of the AO Surgery Reference app utilizing the same responsive user interface that was released February 2020. The highlights are: • Consistent navigational logic and user experience on all screen sizes • Inclusion of feline, canine, and equine fracture care • Combination of Preparation – Approach – Reduction and Fixation – Aftercare into one step called treatment. • Introduction of a powerful search function, allowing simplifications of the user interface as it replaces previous shortcuts.
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.
- Orthopedic classifications
- Clinical scores by joint
- Goniometer tool
- Patient database
- Procedure progress tracking
- Pre- and post-operative follow-up
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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: • The classifications most frequently used in Orthopedics Traumatology; • The main clinical scores per joint for the follow-up of your patients; • A goniometer; • A database for keeping patient information and linking it to the other tools in the application; • 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.
Screenshots
Verdict
The clearest difference is review sentiment: AO Surgery Reference at 86% against CJOrtho's 75%. AO Surgery Reference also leads on iOS requirement (13.0 vs 16.0). 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.
Both ship on a similar rhythm, roughly every 6 months. The most recent releases landed on October 11, 2026 and October 3, 2026 respectively.
| Parameter | AO Surgery Reference | CJOrtho |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (14 ratings) — better | — |
| Positive reviews | 85.8% of reviews — better | 75.0% of reviews |
| Number of ratings | 14 — better | — |
| Update frequency | Every 6 months | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 1 MB | 72 MB |
| Age rating | 17+ | 17+ |
| Developer | AO Foundation | Collège des Jeunes Orthopédistes |
Customer experience
AO Surgery Reference
CJOrtho
In-app purchases
AO Surgery Reference
No in-app purchases
CJOrtho
No in-app purchases
Questions
Is AO Surgery Reference free?
Is CJOrtho free?
Do AO Surgery Reference or CJOrtho have ads?
Which is updated more often, AO Surgery Reference or CJOrtho?
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