# Dermoscopy Two Step Algorithm vs The PrEP Resource

The clearest difference is rating: The PrEP Resource at 5.0 against Dermoscopy Two Step Algorithm's 4.6. Dermoscopy Two Step Algorithm's advantage is ratings volume (10 vs 1) and iOS requirement (10.0 vs 13.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

The PrEP Resource holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Dermoscopy Two Step Algorithm has 10 ratings behind it against 1, so its average is the more settled of the two.

Dermoscopy Two Step Algorithm ships an update every 5 months, The PrEP Resource every 7 months. The most recent releases landed on September 11, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | Dermoscopy Two Step Algorithm | The PrEP Resource |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (10 ratings)](https://appshunter.io/ios/app/dermoscopy-two-step-algorithm/id731753300/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/the-prep-resource/id1672652294/reviews)** |
| Number of ratings | **10** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 7 months |
| Monetization | Free | Free |
| Size | 220 MB | 48 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Usatine & Erickson Media LLC](https://appshunter.io/developer/1466894388) | [Complete Medicine, LLC](https://appshunter.io/developer/1630825166) |

## 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


### The PrEP Resource

[App page](https://appshunter.io/ios/app/the-prep-resource/id1672652294)

This medical app assists clinicians in screening patients for HIV pre-exposure prophylaxis (PrEP), selecting and prescribing appropriate regimens, and managing follow-up care. It offers tools for initial evaluation, counseling, and includes offline access to guidelines and calculators.

**Highlights:** HIV PrEP screening tool, Prescribing and counseling guidance, Follow-up and discontinuation advice, Clinical calculators, Offline USPHS guidelines, Offline clinical tools

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Dermoscopy Two Step Algorithm free?

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

### Is The PrEP Resource free?

The PrEP Resource is free to download, with no in-app purchases.

### Which has better reviews, Dermoscopy Two Step Algorithm or The PrEP Resource?

The PrEP Resource is rated higher. Dermoscopy Two Step Algorithm averages 4.6 out of 5 from 10 ratings, while The PrEP Resource averages 5.0 from 1 ratings.

### Do Dermoscopy Two Step Algorithm or The PrEP Resource have ads?

Neither Dermoscopy Two Step Algorithm nor The PrEP Resource shows ads.

### Which is updated more often, Dermoscopy Two Step Algorithm or The PrEP Resource?

Dermoscopy Two Step Algorithm ships an update every 5 months, and The PrEP Resource every 7 months. Most recently, Dermoscopy Two Step Algorithm was updated on September 11, 2026 and The PrEP Resource on September 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.*