# AO Surgery Reference vs PsychAtlas

The clearest difference is rating: PsychAtlas at 5.0 against AO Surgery Reference's 4.4. AO Surgery Reference's advantage is update cadence (every 6 months vs every 17 months) and ratings volume (14 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

PsychAtlas holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: AO Surgery Reference has 14 ratings behind it against 1, so its average is the more settled of the two.

AO Surgery Reference ships an update every 6 months, PsychAtlas every 17 months. The most recent releases landed on September 24, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | AO Surgery Reference | PsychAtlas |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (14 ratings)](https://appshunter.io/ios/app/ao-surgery-reference/id403961165/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/psychatlas/id6743687363/reviews)** |
| Number of ratings | **14** | 1 |
| Positive reviews | 85.8% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 17 months |
| Monetization | Free | Free |
| Size | 1 MB | 4 MB |
| Requires iOS | **13.0** | 26.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [AO Foundation](https://appshunter.io/developer/399757056) | [Cameron Sabet](https://appshunter.io/developer/1803993569) |

## What reviewers say

### AO Surgery Reference

[App page](https://appshunter.io/ios/app/ao-surgery-reference/id403961165)

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.

**Highlights:** 353 fracture types covered, 172 surgical approaches, 1222 surgical procedures, Over 30,000 illustrations, Feline, canine, and equine fracture care, Powerful search function

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### PsychAtlas

[App page](https://appshunter.io/ios/app/psychatlas/id6743687363)

Master psychiatry with focused lessons, clinical reasoning, and thousands of practice questions. Explore 19 domains covering diagnosis, pharmacology, and treatment. Test your knowledge with customizable quizzes and daily challenges.

**Highlights:** Thousands of practice questions with explanations, 19 psychiatry domains for rapid review, Clinical reasoning cases, Medication reference, Daily challenges and customizable quizzes, Progress tracking and statistics

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is AO Surgery Reference free?

AO Surgery Reference is free to download, with no in-app purchases.

### Is PsychAtlas free?

PsychAtlas is free to download, with no in-app purchases.

### Which has better reviews, AO Surgery Reference or PsychAtlas?

PsychAtlas is rated higher. AO Surgery Reference averages 4.4 out of 5 from 14 ratings, while PsychAtlas averages 5.0 from 1 ratings.

### Do AO Surgery Reference or PsychAtlas have ads?

Neither AO Surgery Reference nor PsychAtlas shows ads.

### Which is updated more often, AO Surgery Reference or PsychAtlas?

AO Surgery Reference ships an update every 6 months, and PsychAtlas every 17 months. Most recently, AO Surgery Reference was updated on September 24, 2026 and PsychAtlas on September 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*