Comparison

Dermoscopy Two Step Algorithm vs Top Derm

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
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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

About

Top Derm

This game is designed for dermatologists by dermatologists, offering a fun and challenging way to learn and identify skin disorders. It features medically accurate imagery and neuroscience-based game mechanics to enhance knowledge retention.

Highlights
  • Medically accurate derm imagery
  • Neuroscience-based game mechanics
  • Earn CME credits
  • Wide variety of dermatology topics
  • Customizable topic selection
  • High-resolution imagery with zoom
  • Personal expertise tracking
Features
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A GAME MADE JUST FOR DERMATOLOGISTS Top Derm is made by derms for derms. We worked with over 140 derm experts to create a medically accurate, fun, and challenging experience, unlike any other medical resource you’ve ever seen. Top Derm is a first-of-its-kind mobile game made by dermatology experts for dermatologists. Covering a wide variety of dermatology topics, Top Derm is packed with incredible, medically accurate, computer-generated derm imagery, in quick-burst challenges pulled from evidence-based research. Built on neuroscience-based game mechanics, Top Derm is a unique medical resource that also happens to be a ton of fun. DERM IMAGERY LIKE YOU HAVE NEVER SEEN BEFORE Our dermatologist-approved, groundbreaking DeepSkinFX™ Generator harnesses the most cutting-edge visual effects and video game technology to create mind-blowing, medically accurate, high-resolution imagery of any skin disorder on any region of the body and any skin tone, so you can visually experience a wide variety of derm scenarios. FROM ADULT DERMATOLOGY TO ZEBRA CASES AND BEYOND Short, rapid-fire, focused challenge packs deliver well-rounded dermatology challenges that strengthen your derm knowledge and your ability to visually identify common and rare skin disorders. NEUROSCIENCE MEETS ENTERTAINMENT ON THE GO Top Derm is backed by neuroscience-based game mechanics that help you acquire and retain knowledge. It’s also a ton of fun and ready to go on your phone at any time. So whether you’re between patients, on a lunch break, or just sitting down to relax, Top Derm is waiting for you. FEATURES EARN CME CREDITS Finding the time and opportunity to earn CME credits can be challenging. We make it easy, convenient, and fun. A WIDE VARIETY OF SUBJECTS Challenges cover a breadth of topics: skin cancer, pediatric dermatology, adult dermatology, cosmetic dermatology, and surgical dermatology. New challenge packs are released regularly. CHOOSE YOUR TOPICS Gameplay is customized to your interests. Choose your favorite topics, and you’ll be presented with more challenges covering those areas. SKIN OF COLOR Skin tone affects the appearance of different disorders. Our DeepSkinFX™ Generator creates medically accurate imagery showcasing conditions on different skin types so you can view conditions as they appear on various skin tones. TAKE A CLOSER LOOK All clinical imagery in Top Derm is included at high resolution for close-up study. Tap the magnifying glass at the corner of the image, and it expands to full screen. Pinch and spread to zoom in or out. It’s all in the details. PERSONAL EXPERTISE MAPS Track your performance with a dynamic report that shows your progress, areas of strength, and improvement opportunities. SUPPLEMENTAL READING Every challenge is built on evidence-based research. We’ve included the option to review that material at the end of each challenge. SHAPE THE GAME, HELP THE COMMUNITY Rate and give feedback on the challenges to help make the game as good as it can be and contribute to the state of the art in dermatology. BUILT BY LEADING DERMATOLOGY EXPERTS Our team of world-renowned dermatology experts includes Peter Lio, MD Dermatology, Medical Dermatology Associates of Chicago; Shraddha Desai, MD, FAAD, Director of Cosmetic and Laser Surgery, Dupage Medical Group Dermatology, Adjunct Professor of Dermatology, Loyola University; Aaron Fuchs, MD, Fuchs Dermatology; Sara Hogan, MD, Dermatology, Laser Skin Care Center Dermatology Associates; Dr. Sara Dickie, Plastic and Reconstructive Surgery, Illinois Dermatology Institute; and others.

Screenshots

Dermoscopy Two Step Algorithm4 screens
Top Derm4 screens

Verdict

The call

Dermoscopy Two Step Algorithm and Top Derm both sit at 4.6 stars, but that hides the real split: 100% of Dermoscopy Two Step Algorithm's written reviews are positive against 60% of Top Derm's. Dermoscopy Two Step Algorithm also leads on ads (none vs shown) and monetization model (free vs free with in-app purchases). Top Derm's advantage is update cadence (every 6 weeks vs every 5 months) and ratings volume (59 vs 10). On price, rating, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.6 for Dermoscopy Two Step Algorithm against 4.5 for Top Derm. That said, the two scores are not equally well evidenced: Top Derm has 59 ratings behind it against 10, so its average is the more settled of the two. Written reviews are what separate them: 100% of Dermoscopy Two Step Algorithm's written reviews are positive against 60% of Top Derm's.

UpkeepUpdate frequency

Dermoscopy Two Step Algorithm ships an update every 5 months, Top Derm every 6 weeks. The most recent releases landed on September 11, 2026 and June 1, 2026 respectively.

Scorecard6 real differences · 4 level
Dermoscopy Two Step Algorithm versus Top Derm: the parameters behind the verdict, then further details
ParameterDermoscopy Two Step AlgorithmTop Derm
PriceFreeFree
Rating4.6 (10 ratings) — better4.5 (59 ratings)
Positive reviews100.0% of reviews — better60.0% of reviews
Number of ratings1059 — better
Update frequencyEvery 5 monthsEvery 6 weeks — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better15.0
Further details — not scored
Size220 MB248 MB
Age rating17+12+
DeveloperUsatine & Erickson Media LLCRelevate Health Group, LLC

Customer experience

Dermoscopy Two Step Algorithm

All ratings10 ratings
Positive90.0%
Neutral0.0%
Negative10.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Top Derm

All ratings59 ratings
Positive86.4%
Neutral0.0%
Negative13.6%
Written reviews15 reviews
Positive60.0%
Neutral0.0%
Negative40.0%

In-app purchases

None

Dermoscopy Two Step Algorithm

No in-app purchases

None

Top Derm

No in-app purchases

Questions

Is Dermoscopy Two Step Algorithm free?
Dermoscopy Two Step Algorithm is free to download, with no in-app purchases.
Is Top Derm free?
Top Derm is free to download, with no in-app purchases.
Which has better reviews, Dermoscopy Two Step Algorithm or Top Derm?
Dermoscopy Two Step Algorithm is rated higher. Dermoscopy Two Step Algorithm averages 4.6 out of 5 from 10 ratings, while Top Derm averages 4.5 from 59 ratings.
Do Dermoscopy Two Step Algorithm or Top Derm have ads?
Top Derm shows ads; Dermoscopy Two Step Algorithm does not.
Which is updated more often, Dermoscopy Two Step Algorithm or Top Derm?
Dermoscopy Two Step Algorithm ships an update every 5 months, and Top Derm every 6 weeks. Most recently, Dermoscopy Two Step Algorithm was updated on September 11, 2026 and Top Derm on June 1, 2026.

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