AO Surgery Reference vs RezClock
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.
RezClock
Automates medical resident duty hour tracking using location services to log arrival and departure times at clinical sites. Hours can be uploaded to other systems for generating ACGME required reports. Offers a free trial period before subscription.
- Automated time tracking
- Location-based geofencing
- Duty hours reporting
- Data upload to MedProSuite
- Free trial period
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Medical Resident Duty Hours management app. RezClock automates time tracking for medical residents. RezClock uses phone's location services to determine when the resident arrives and leaves the clinical site. A clinical site is defined by creating a geofence around each work site user visits. The hours captured can then be uploaded to MedProSuite.com or another Duty Hours Tracking product to generate ACGME required Duty Hours Reports. Please note: Continued use of GPS running in the background can dramatically decrease battery life. RezClock is available by subscription(first 15 days are free). You may continue by: - Subscribing to RezClock Monthly for $0.99/month - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Terms & Conditions - http://rezclock.com/terms-conditions.html Privacy - http://rezclock.com/privacy.html
Screenshots
Verdict
The clearest difference is review sentiment: AO Surgery Reference at 86% against RezClock's 0%. AO Surgery Reference also leads on rating (4.4 vs 2.3) and in-app purchases (none vs 1). RezClock's advantage is iOS requirement (10.0 vs 13.0). On price, ads 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. RezClock sells 1 in-app purchase, starting at $0.99 per month. AO Surgery Reference asks for nothing beyond the download.
AO Surgery Reference holds the better App Store score, 4.4 against 2.3. Both are backed by a comparable volume of ratings — 14 and 3 respectively. Written reviews point the same way: 86% of AO Surgery Reference's written reviews are positive against 0% of RezClock's.
AO Surgery Reference ships an update every 6 months, RezClock every 35 months. The most recent releases landed on October 11, 2026 and October 2, 2026 respectively.
| Parameter | AO Surgery Reference | RezClock |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (14 ratings) — better | 2.3 (3 ratings) |
| Positive reviews | 85.8% of reviews — better | 0.0% of reviews |
| Number of ratings | 14 — better | 3 |
| Update frequency | Every 6 months — better | Every 35 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Subscription |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 13.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 24 MB |
| Age rating | 17+ | 4+ |
| Developer | AO Foundation | Mitra U.S. Computer Solutions, Inc |
Customer experience
AO Surgery Reference
RezClock
In-app purchases
AO Surgery Reference
No in-app purchases
RezClock
- RezClock Monthly - $0.99/month$0.991 Month
Questions
Is AO Surgery Reference free?
Is RezClock free?
Which has better reviews, AO Surgery Reference or RezClock?
Do AO Surgery Reference or RezClock have ads?
Which is updated more often, AO Surgery Reference or RezClock?
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