# VisualDx vs Dermoscopy Two Step Algorithm

The clearest difference is in-app purchases: Dermoscopy Two Step Algorithm at none against VisualDx's 11. Dermoscopy Two Step Algorithm also leads on review sentiment (100% vs 84%) and iOS requirement (10.0 vs 16.4). VisualDx's advantage is update cadence (fortnightly vs every 5 months) and ratings volume (186 vs 10). On price, rating, ads and device support there is nothing between them.

Both are free to download. VisualDx sells 11 in-app purchases, starting at $39.99 per month. Dermoscopy Two Step Algorithm asks for nothing beyond the download.

Dermoscopy Two Step Algorithm holds the better App Store score, 4.6 against 4.4. That said, the two scores are not equally well evidenced: VisualDx has 186 ratings behind it against 10, 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 100% of Dermoscopy Two Step Algorithm's.

VisualDx ships an update fortnightly, Dermoscopy Two Step Algorithm every 5 months. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | VisualDx | Dermoscopy Two Step Algorithm |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (186 ratings)](https://appshunter.io/ios/app/visualdx/id348177521/reviews) | **[4.6 (10 ratings)](https://appshunter.io/ios/app/dermoscopy-two-step-algorithm/id731753300/reviews)** |
| Number of ratings | **186** | 10 |
| Positive reviews | 84.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 months |
| Monetization | Subscription | **Free** |
| Best chart rank | **#13** | — |
| Size | 220 MB | 220 MB |
| Requires iOS | 16.4 | **10.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Logical Images](https://appshunter.io/developer/348177524) | [Usatine & Erickson Media LLC](https://appshunter.io/developer/1466894388) |

## What reviewers say

### VisualDx

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

**Currently charting:** #13 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


### Dermoscopy Two Step Algorithm

[App page](https://appshunter.io/ios/app/dermoscopy-two-step-algorithm/id731753300)

This app guides healthcare professionals in interpreting dermoscopic patterns to identify skin lesions. It uses a series of questions and provides over 80 images and charts to aid in diagnosis. Interactive cases are included for practice.

**Highlights:** Dermoscopic pattern interpretation, Question-based diagnostic guidance, Over 80 photos and charts, 50 interactive diagnostic cases, Offline functionality, Melanocytic and non-melanocytic lesion analysis

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

**In-app purchases:** none


## Frequently asked questions

### Is VisualDx free?

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

### Is Dermoscopy Two Step Algorithm free?

Dermoscopy Two Step Algorithm is free to download, with no in-app purchases.

### Which has better reviews, VisualDx or Dermoscopy Two Step Algorithm?

Dermoscopy Two Step Algorithm is rated higher. VisualDx averages 4.4 out of 5 from 186 ratings, while Dermoscopy Two Step Algorithm averages 4.6 from 10 ratings.

### Do VisualDx or Dermoscopy Two Step Algorithm have ads?

Neither VisualDx nor Dermoscopy Two Step Algorithm shows ads.

### Which is updated more often, VisualDx or Dermoscopy Two Step Algorithm?

VisualDx ships an update fortnightly, and Dermoscopy Two Step Algorithm every 5 months. Most recently, VisualDx was updated on October 12, 2026 and Dermoscopy Two Step Algorithm on October 7, 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.*