Comparison

VisualDx vs Dermoscopy Two Step Algorithm

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

Head to head
About

VisualDx

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
Currently charting
Read full description

VisualDx is a visual reference tool for medical professionals that leverages AI technology and a comprehensive image atlas to support faster, more confident decisions, fewer unnecessary referrals and testing, and higher patient engagement and satisfaction. With VisualDx, clinicians can: • Build dynamic differentials that evolve as you think. • Use guided support to surface clinically relevant results. • Compare diagnoses to improve decisions for your patients. • Use our AI to take a picture of your patient’s skin condition to better understand morphology and possibilities. • Engage with patients by sharing pictures of skin that reflect their disease presentation. • Access therapy and testing recommendations across over 3,500 conditions. • Quickly recognize infectious diseases and travel-related illnesses with our public health resources. • Test your diagnostic skills with our image challenges and educational resources. • Earn 0.5 AMA PRA Category 1 Credits™ for internet point of care activity with every search. See why this award-winning clinical decision support system is being used in more than 2,300 hospitals, clinics, and medical schools by physicians, nurses, students, PAs, NPs, and other healthcare professionals worldwide. VisualDx requires a subscription. Terms of Use: https://www.visualdx.com/legal/acceptable-use-policy-notice Privacy Policy: https://www.visualdx.com/legal/privacy-policy/

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
Read full description

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

Screenshots

VisualDx4 screens
Dermoscopy Two Step Algorithm4 screens

Verdict

The call

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.

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 4 level
VisualDx versus Dermoscopy Two Step Algorithm: the parameters behind the verdict, then further details
ParameterVisualDxDermoscopy Two Step Algorithm
PriceFreeFree
Rating4.4 (186 ratings)4.6 (10 ratings) — better
Positive reviews84.3% of reviews100.0% of reviews — better
Number of ratings186 — better10
Update frequencyFortnightly — betterEvery 5 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionFree — better
Best chart rank#12 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.410.0 — better
Further details — not scored
Size220 MB220 MB
Age rating17+17+
DeveloperLogical ImagesUsatine & Erickson Media LLC

Customer experience

VisualDx

All ratings186 ratings
Positive83.3%
Neutral4.8%
Negative11.8%
Written reviews102 reviews
Positive84.3%
Neutral1.0%
Negative14.7%

Dermoscopy Two Step Algorithm

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

Bugs and requests

VisualDx

Reported bugs

6 issues
  • 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
Show 1 more
  • Account access issues after payment

Requested features

6 requests
  • 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
Show 1 more
  • Better quiz image clarity and context

Dermoscopy Two Step Algorithm

Not enough reviews yet to summarise bugs or requests.

In-app purchases

11 purchases

VisualDx

Subscriptions9
  • Complete (1 Month)1 Month trial$39.991 Month
  • VisualDx Core Monthly7 Days trial$39.991 Month
  • Complete+DermExpert (1 Month)1 Month trial$49.991 Month
Show 6 more
  • VisualDx Elite Monthly7 Days trial$49.991 Month
  • Add DermExpert (1 Year)$99.991 Year
  • Complete (1 Year)1 Month trial$149.991 Year
  • VisualDx Core Annual7 Days trial$249.991 Year
  • VisualDx Elite Annual7 Days trial$299.991 Year
  • Complete+DermExpert (1 Year)1 Month trial$499.991 Year
One-time2
  • Add DermExpert (1 yr)$99.99
  • Complete (1 yr)$399.99
None

Dermoscopy Two Step Algorithm

No in-app purchases

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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