Dermoscopy Two Step Algorithm vs The PrEP Resource
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Dermoscopy Two Step Algorithm
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.
- Dermoscopic pattern interpretation
- Question-based diagnostic guidance
- Over 80 photos and charts
- 50 interactive diagnostic cases
- Offline functionality
- Melanocytic and non-melanocytic lesion analysis
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This app is intended to help you interpret the dermoscopic patterns seen with your dermatoscope. You will be asked a series of questions that will lead you to the most probable diagnosis. This app also contains over 80 photos and charts to help you in your diagnosis. No internet connection needed to view the full app. It is all ready for super quick image and information retrieval. There are also 50 interactive cases to solve. Each case starts with a clinical and dermoscopic image and ends with a labelled dermoscopic image pointing out critical structures. This app is based on the 2 step algorithm with the first step involving the determination of whether the lesion is a melanocytic. Melanocytic lesions will be divided into nevi or lesions with varying levels of suspicion for melanoma based on melanoma specific patterns and common nevi patterns. Non-melanocytic lesions will be analyzed to determine if they are suspicious for basal cell carcinoma or squamous cell carcinoma. Common benign lesions such as dermatofibroma, seborrheic keratoses and hemangiomas will be positively identified to avoid unnecessary biopsies. This app will increase your ability to detect skin cancers with greater accuracy thereby decreasing unnecessary biopsies and missing less early melanomas and nonmelanoma skin cancers. Check out https://usatinemedia.com to learn more and watch a video demo of this app narrated by Dr. Richard P. Usatine. Authors: Ashfaq A. Marghoob, MD Memorial Sloan-Kettering Cancer Center New York, New York Richard P. Usatine, MD University of Texas Health Science Center San Antonio, Texas Natalia Jaimes, MD Aurora Skin Cancer Center and Universidad Pontificia Bolivariana Medellin, Colombia To learn more dermoscopy from these authors, see www.americandermoscopy.com. Disclaimer: This app is intended for the education of healthcare professionals and not as a diagnostic and treatment reference for the general population. Disclaimer: While this app may help you in rendering a correct diagnosis, it is not intended to entirely replace the findings on patient history and physical examination including examination of the lesion with side lighting and touch. The final diagnosis rests on properly assimilating the information gained from the patient history, thorough naked eye physical examination, and meticulous dermoscopic inspection of the lesion. 3Gen, Inc. is the sponsor of this app. Visit www.dermlite.com to see their complete line of skin imaging devices. Developed by Usatine Media Richard P. Usatine, MD, Co-President, Professor of Family & Community Medicine, Professor of Dermatology and Cutaneous Surgery, University of Texas Health San Antonio Peter Erickson, Co-President, Lead Software Developer
The PrEP Resource
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.
- HIV PrEP screening tool
- Prescribing and counseling guidance
- Follow-up and discontinuation advice
- Clinical calculators
- Offline USPHS guidelines
- Offline clinical tools
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This point of care app is designed to help clinicians feel more comfortable screening patients for pre-exposure prophylaxis to prevent HIV transmission, choosing and prescribing a regimen, and follow-up/discontinuing the medications. Includes a screening tool, prescribing tool, counseling and initial evaluation tools, and information for follow-up and discontinuing PrEP. The app also includes resources and applicable calculators. Features Clinical Tools: ~Screening Tool ~Prescribing and Counseling Tool ~Follow-up and Discontinuing Recommendations ~Clinical Calculators ~USPHS Guidelines available offline ~All clinical tools available offline
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Dermoscopy Two Step Algorithm | The PrEP Resource |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (10 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 10 — better | 1 |
| Update frequency | Every 5 months — better | Every 7 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 220 MB | 48 MB |
| Age rating | 17+ | 17+ |
| Developer | Usatine & Erickson Media LLC | Complete Medicine, LLC |
Customer experience
Dermoscopy Two Step Algorithm
The PrEP Resource
In-app purchases
Dermoscopy Two Step Algorithm
No in-app purchases
The PrEP Resource
No in-app purchases
Questions
Is Dermoscopy Two Step Algorithm free?
Is The PrEP Resource free?
Which has better reviews, Dermoscopy Two Step Algorithm or The PrEP Resource?
Do Dermoscopy Two Step Algorithm or The PrEP Resource have ads?
Which is updated more often, Dermoscopy Two Step Algorithm or The PrEP Resource?
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