AO Surgery Reference vs iLARS
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.
iLARS
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iLARS — Post-Surgical Recovery Tracker iLARS is a specialized clinical tool designed to help patients monitor their health and functional recovery following surgery (Lower Anterior Resection). Created for use within partner healthcare institutions, the app provides a seamless way for patients to track their symptoms and share objective recovery data with their medical team. Key Features: Daily Symptom Tracking: Easily record your daily condition, including bowel habits and physical well-being. Validated Questionnaires: Complete weekly LARS (Low Anterior Resection Syndrome) scores and monthly Quality of Life (QoL) assessments to monitor your progress over time. Activity Monitoring: Automatically sync your daily step count to provide your doctor with objective data on your physical activity levels during recovery. Clinic Integration: Your health data is securely shared with your treating physician, enabling more personalized follow-up care and better-informed medical consultations. Simple & Private Access: Access the app using a unique patient code provided by your hospital. No complex registration or lengthy setup is required. Important Note: iLARS is intended for use by patients of participating hospitals. Please consult with your healthcare provider to receive your unique access code. This app is for informational and educational use and does not replace professional medical advice.
Screenshots
Verdict
The clearest difference is update cadence: iLARS at every 3 weeks against AO Surgery Reference's every 6 months. On price, ads, in-app purchases and device support 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.
AO Surgery Reference ships an update every 6 months, iLARS every 3 weeks. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.
| Parameter | AO Surgery Reference | iLARS |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (14 ratings) — better | — |
| Positive reviews | 85.8% of reviews | — |
| Number of ratings | 14 — better | — |
| Update frequency | Every 6 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 1 MB | 20 MB |
| Age rating | 17+ | 12+ |
| Developer | AO Foundation | ABBA GROUP, MB |
In-app purchases
AO Surgery Reference
No in-app purchases
iLARS
No in-app purchases
Questions
Is AO Surgery Reference free?
Is iLARS free?
Do AO Surgery Reference or iLARS have ads?
Which is updated more often, AO Surgery Reference or iLARS?
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