# NEJM Image Challenge vs ACP Audio

The clearest difference is review sentiment: NEJM Image Challenge at 50% against ACP Audio's 0%. NEJM Image Challenge also leads on rating (4.8 vs 3.0) and iOS requirement (8.0 vs 15.6). ACP Audio's advantage is price (Free vs $9.99) and update cadence (every 4 months vs every 16 months). On ratings volume, ads, in-app purchases and device support there is nothing between them.

ACP Audio is free to download; NEJM Image Challenge costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

NEJM Image Challenge holds the better App Store score, 4.8 against 3.0. Both are backed by a comparable volume of ratings — 9 and 8 respectively. Written reviews point the same way: 50% of NEJM Image Challenge's written reviews are positive against 0% of ACP Audio's.

NEJM Image Challenge ships an update every 16 months, ACP Audio every 4 months. The most recent releases landed on October 14, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | NEJM Image Challenge | ACP Audio |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | **[4.8 (9 ratings)](https://appshunter.io/ios/app/nejm-image-challenge/id403219522/reviews)** | [3.0 (8 ratings)](https://appshunter.io/ios/app/acp-audio/id6463427749/reviews) |
| Number of ratings | **9** | 8 |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 4 months** |
| Monetization | **Paid** | Subscription |
| Size | 5 MB | 105 MB |
| Requires iOS | **8.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [The New England Journal of Medicine](https://appshunter.io/developer/373156257) | [American College of Physicians](https://appshunter.io/developer/371090673) |

## What reviewers say

### NEJM Image Challenge

[App page](https://appshunter.io/ios/app/nejm-image-challenge/id403219522)

Test and sharpen your diagnostic and visual skills with challenging clinical photos. This app offers detailed images with zoom capabilities and immediate feedback on diagnoses. It's designed for medical professionals to practice anytime, anywhere.

**Highlights:** Challenging clinical photos, Zoomable detailed images, Immediate diagnostic feedback, See how others answered, Random image selection

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

**In-app purchases:** none


### ACP Audio

[App page](https://appshunter.io/ios/app/acp-audio/id6463427749)

Access hundreds of hours of medical education content, including clinical lectures and Q&A sessions from national experts. Listen to audio tracks and playlists on various medical topics, create custom playlists, and download content for offline listening.

**Highlights:** Audio versions of ACP educational products, Hundreds of hours of medical content, Clinical lectures and Q&A, Listen to tracks and playlists, Download tracks for offline listening, Create favorite track lists

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NEJM Image Challenge free?

NEJM Image Challenge costs $9.99, with no in-app purchases.

### Is ACP Audio free?

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

### Which has better reviews, NEJM Image Challenge or ACP Audio?

NEJM Image Challenge is rated higher. NEJM Image Challenge averages 4.8 out of 5 from 9 ratings, while ACP Audio averages 3.0 from 8 ratings.

### Do NEJM Image Challenge or ACP Audio have ads?

Neither NEJM Image Challenge nor ACP Audio shows ads.

### Which is updated more often, NEJM Image Challenge or ACP Audio?

NEJM Image Challenge ships an update every 16 months, and ACP Audio every 4 months. Most recently, NEJM Image Challenge was updated on October 14, 2026 and ACP Audio on October 21, 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.*