# VisualDx vs AMBOSS Medical Knowledge

The clearest difference is monetization model: AMBOSS Medical Knowledge at free with in-app purchases against VisualDx's subscription. AMBOSS Medical Knowledge also leads on rating (4.9 vs 4.4) and ratings volume (14K vs 186). VisualDx's advantage is ads (none vs shown). On price, review sentiment, update cadence and in-app purchases there is nothing between them.

Both are free to download. VisualDx sells 11 in-app purchases, starting at $39.99 per month and AMBOSS Medical Knowledge sells 1 in-app purchase, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

AMBOSS Medical Knowledge holds the better App Store score, 4.9 against 4.4. That said, the two scores are not equally well evidenced: AMBOSS Medical Knowledge has 14K ratings behind it against 186, so its average is the more settled of the two. Written reviews point the same way: 84% of VisualDx's written reviews are positive against 86% of AMBOSS Medical Knowledge's.

VisualDx ships an update fortnightly, AMBOSS Medical Knowledge monthly. Both last shipped on September 23, 2026.

## The numbers

| Metric | VisualDx | AMBOSS Medical Knowledge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (186 ratings)](https://appshunter.io/ios/app/visualdx/id348177521/reviews) | **[4.9 (14K ratings)](https://appshunter.io/ios/app/amboss-medical-knowledge/id1169487026/reviews)** |
| Number of ratings | 186 | **14K** |
| Positive reviews | 84.3% of reviews | **86.4% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Monthly |
| Monetization | Subscription | **Free with in-app purchases** |
| Best chart rank | **#15** | #31 |
| Size | 226 MB | 72 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [Logical Images](https://appshunter.io/developer/348177524) | [AMBOSS](https://appshunter.io/developer/918156225) |

## What reviewers say

### VisualDx

[App page](https://appshunter.io/ios/app/visualdx/id348177521)

**Currently charting:** #15 Top Grossing · Medical (US App Store)

This visual reference tool aids medical professionals in improving patient engagement and diagnostic accuracy. It utilizes AI and a vast image atlas to help build custom differentials, share patient-specific images, and access comprehensive diagnostic information. Earn continuing education credits while making better medical decisions.

**Highlights:** Build custom differentials, Engage patients with visual aids, Improve diagnostic accuracy, Access therapy and test options, Recognize infectious diseases, Earn CME credits

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Complete (1 Month) | $39.99 | per month |
| VisualDx Core Monthly | $39.99 | per month |
| Complete+DermExpert (1 Month) | $49.99 | per month |
| VisualDx Elite Monthly | $49.99 | per month |
| Add DermExpert (1 Year) | $99.99 | per year |
| Complete (1 Year) | $149.99 | per year |
| VisualDx Core Annual | $249.99 | per year |
| VisualDx Elite Annual | $299.99 | per year |
| Complete+DermExpert (1 Year) | $499.99 | per year |
| Add DermExpert (1 yr) | $99.99 | one-time |
| Complete (1 yr) | $399.99 | one-time |

**What reviewers like**

- 📸 Excellent clinical images and kodachromes
- 👍 User-friendly interface and easy navigation
- 🎓 Comprehensive differential diagnosis tool
- 📚 Detailed disease summaries and treatment information
- 🌍 Inclusive representation of skin of color

**What reviewers complain about**

- 💰 Expensive subscription cost
- ❌ Difficult subscription cancellation process
- 🐛 App crashes and performance issues
- 📱 Quiz feature laggy and unreliable
- 😤 Poor customer service responsiveness

**Reported bugs**

- App crashes when using quiz feature
- CME credit claiming functionality fails
- Subscription cancellation not processed
- Renewal charges despite cancellation requests
- Quiz unable to load properly

**Requested features**

- Make app free again (previously free)
- Simplify subscription cancellation in-app
- Improve quiz functionality for mobile
- Add quiz feature to desktop version
- Expand patient information handouts


### AMBOSS Medical Knowledge

[App page](https://appshunter.io/ios/app/amboss-medical-knowledge/id1169487026)

**Currently charting:** #31 Top Grossing · Medical (US App Store)

This app provides quick, reliable answers for medical professionals and students. It offers offline access to clinical information, diagnostic image interpretation, and patient care tools. Prepare for exams with high-yield content and integrate with flashcards for enhanced learning.

**Highlights:** Offline clinical knowledge access, Diagnostic image interpretation, Patient care tools (flowcharts, checklists, calculators), USMLE and Shelf exam preparation, Anki flashcard integration, Evidence-based medical content

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AMBOSS Membership | $19.99 | per month |

**What reviewers like**

- 👍 Easy to navigate and fast to find information
- 🚀 Comprehensive and clear
- 🚀 Excellent platform for learning medicine
- 🚀 Great medical resource for students and clinicians
- 🚀 Unequivocally the best platform for learning medicine

**What reviewers complain about**

- 🐛 Difficulties using the app and studying after recent update
- 🔓 App limitations like no highlighting, text size adjustment, or digital notebook
- 🐛 Occasional crashes
- 🐛 Knowledge app stopped working
- 🐛 Poor quality of questions in the question bank

**Reported bugs**

- Forced interaction with Safari from the app
- Inability to access articles and diagrams
- Tiny font size that cannot be adjusted

**Requested features**

- Add article options in clinician mode
- Bring back old highlight color
- Add dark mode
- Increase text size
- Add AI assistant to search content and provide answers


## Frequently asked questions

### Is VisualDx free?

VisualDx is free to download, with in-app purchases available.

### Is AMBOSS Medical Knowledge free?

AMBOSS Medical Knowledge is free to download, with in-app purchases available.

### Which has better reviews, VisualDx or AMBOSS Medical Knowledge?

AMBOSS Medical Knowledge is rated higher. VisualDx averages 4.4 out of 5 from 186 ratings, while AMBOSS Medical Knowledge averages 4.9 from 14K ratings.

### Do VisualDx or AMBOSS Medical Knowledge have ads?

AMBOSS Medical Knowledge shows ads; VisualDx does not.

### Which is updated more often, VisualDx or AMBOSS Medical Knowledge?

VisualDx ships an update fortnightly, and AMBOSS Medical Knowledge monthly. Most recently, VisualDx was updated on September 23, 2026 and AMBOSS Medical Knowledge on September 23, 2026.

### Which is more popular, VisualDx or AMBOSS Medical Knowledge?

VisualDx currently peaks at #15 in the App Store charts, and AMBOSS Medical Knowledge at #31. Chart position reflects recent download velocity rather than total install base.

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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.*