# AO Surgery Reference vs The eFACE

The clearest difference is review sentiment: AO Surgery Reference at 86% against The eFACE's 0%. AO Surgery Reference also leads on price (Free vs $9.99) and rating (4.4 vs 2.0). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

AO Surgery Reference is free to download; The eFACE costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

AO Surgery Reference holds the better App Store score, 4.4 against 2.0. 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. Written reviews point the same way: 86% of AO Surgery Reference's written reviews are positive against 0% of The eFACE's.

AO Surgery Reference ships an update every 6 months, The eFACE every 55 months. The most recent releases landed on October 7, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | AO Surgery Reference | The eFACE |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[4.4 (14 ratings)](https://appshunter.io/ios/app/ao-surgery-reference/id403961165/reviews)** | [2.0 (1 ratings)](https://appshunter.io/ios/app/the-eface/id1032767378/reviews) |
| Number of ratings | **14** | 1 |
| Positive reviews | **85.8% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 55 months |
| Monetization | **Free** | Paid |
| Size | 1 MB | 25 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [AO Foundation](https://appshunter.io/developer/399757056) | [Massachusetts Eye and Ear Infirmary](https://appshunter.io/developer/691435684) |

## 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


### The eFACE

[App page](https://appshunter.io/ios/app/the-eface/id1032767378)

This medical application provides quantitative and graphic assessments of facial function scores for patients with unilateral facial paralysis. It analyzes resting, dynamic, and synkinesis movements, offering clinician-rated scores for 16 facial function features.

**Highlights:** Quantitative facial function scoring, Graphic depiction of facial scores, Analysis of resting facial positions, Assessment of dynamic facial movements, Synkinesis (misrouting) scoring, Clinician-rated scores for 16 features

**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 The eFACE free?

The eFACE costs $9.99, with no in-app purchases.

### Which has better reviews, AO Surgery Reference or The eFACE?

AO Surgery Reference is rated higher. AO Surgery Reference averages 4.4 out of 5 from 14 ratings, while The eFACE averages 2.0 from 1 ratings.

### Do AO Surgery Reference or The eFACE have ads?

Neither AO Surgery Reference nor The eFACE shows ads.

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

AO Surgery Reference ships an update every 6 months, and The eFACE every 55 months. Most recently, AO Surgery Reference was updated on October 7, 2026 and The eFACE on September 30, 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.*