# Dermoscopy Two Step Algorithm vs Fitzpatrick's Color Atlas

The clearest difference is in-app purchases: Dermoscopy Two Step Algorithm at none against Fitzpatrick's Color Atlas's 5. Dermoscopy Two Step Algorithm also leads on ads (none vs shown) and review sentiment (100% vs 67%). Fitzpatrick's Color Atlas's advantage is ratings volume (30 vs 10). On price, rating, update cadence and device support there is nothing between them.

Both are free to download. Fitzpatrick's Color Atlas sells 5 in-app purchases, starting at $52.99 per year. Dermoscopy Two Step Algorithm asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for Dermoscopy Two Step Algorithm against 4.5 for Fitzpatrick's Color Atlas. Both are backed by a comparable volume of ratings — 10 and 30 respectively. Written reviews are what separate them: 100% of Dermoscopy Two Step Algorithm's written reviews are positive against 67% of Fitzpatrick's Color Atlas's.

Dermoscopy Two Step Algorithm ships an update every 5 months, Fitzpatrick's Color Atlas every 6 months. The most recent releases landed on October 13, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Dermoscopy Two Step Algorithm | Fitzpatrick's Color Atlas |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (10 ratings)](https://appshunter.io/ios/app/dermoscopy-two-step-algorithm/id731753300/reviews)** | [4.5 (30 ratings)](https://appshunter.io/ios/app/fitzpatricks-color-atlas/id1317018164/reviews) |
| Number of ratings | 10 | **30** |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 months** | Every 6 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 220 MB | 149 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 17+ | 17+ |
| Developer | [Usatine & Erickson Media LLC](https://appshunter.io/developer/1466894388) | [Skyscape Medpresso Inc](https://appshunter.io/developer/818609416) |

## What reviewers say

### 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


### Fitzpatrick's Color Atlas

[App page](https://appshunter.io/ios/app/fitzpatricks-color-atlas/id1317018164)

This clinical dermatology resource provides high-quality images and concise summaries of skin disorders. It aids physicians, residents, and students in diagnosing and treating a wide range of dermatologic conditions. Access sample content for free, with an in-app purchase required to unlock the full library.

**Highlights:** Over 1,000 full-color images of skin lesions, Concise summaries of dermatologic disorders, Cutaneous signs of systemic disease, Updated etiology, pathogenesis, management, and therapy, ICD-10 codes included for each disease, Highlights skin disease in diverse ethnic populations

**Features:** Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 15% Off - Limited Period Offer | $52.99 | per year |
| 20% Off - Limited Period Offer | $55.99 | per year |
| 15% Off - Limited Period Offer | $59.99 | per year |
| Fitzpatrick Color Atlas 1/YSub | $69.99 | per year |
| Fitzpatrick's Color Atlas | $69.99 | one-time |


## Frequently asked questions

### Is Dermoscopy Two Step Algorithm free?

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

### Is Fitzpatrick's Color Atlas free?

Fitzpatrick's Color Atlas is free to download, with in-app purchases available.

### Which has better reviews, Dermoscopy Two Step Algorithm or Fitzpatrick's Color Atlas?

Dermoscopy Two Step Algorithm is rated higher. Dermoscopy Two Step Algorithm averages 4.6 out of 5 from 10 ratings, while Fitzpatrick's Color Atlas averages 4.5 from 30 ratings.

### Do Dermoscopy Two Step Algorithm or Fitzpatrick's Color Atlas have ads?

Fitzpatrick's Color Atlas shows ads; Dermoscopy Two Step Algorithm does not.

### Which is updated more often, Dermoscopy Two Step Algorithm or Fitzpatrick's Color Atlas?

Dermoscopy Two Step Algorithm ships an update every 5 months, and Fitzpatrick's Color Atlas every 6 months. Most recently, Dermoscopy Two Step Algorithm was updated on October 13, 2026 and Fitzpatrick's Color Atlas on October 16, 2026.

---

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