Comparison

Smith's Patient Interview, 4/E vs Derm DDx

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

Head to head
About

Smith's Patient Interview, 4/E

Features
Read full description

A comprehensive, evidence-based introduction to the principles and practices of patient communication in a clinical setting Smith's Patient-Centered Interviewing, Fourth Edition presents a step-by-step methodology for mastering every aspect of the medical interview. Readers will learn how to confidently obtain from patients accurate biomedical facts, as well as critical personal, social, and emotional information, allowing them to make a precise diagnosis, develop effective treatment plans, and forge strong clinician-patient relationships. The most evidence-based guide available on the topic, Smith's Patient-Centered Interviewing, Fourth Edition applies the proven 5-step approach, which integrates patient- and clinician-centered skills to improve effectiveness without adding extra time to the interview duration. No Internet connection needed to view the app after it has been downloaded. It is all ready for quick image and information retrieval. This app is optimized for whatever size device you are using, either phone or tablet. This app is easy to navigate, allowing you to browse the contents or search for topics. The search tool shows you suggestions that appear in the text as you type so it is quick and helps with spelling medical terms. It also remembers past search terms so you can go back to a topic or image very easily. You can also create notes and bookmarks separately for chapters, images and tables to enhance your learning. You can also change the text size for easier reading. Check out https://usatinemedia.com to learn more and watch a video demo of this app. This interactive app is based on the full content of Smith's Patient Centered Interviewing: An Evidence-Based Method, Fourth Edition by McGraw-Hill Education. Editors: Auguste H. Fortin VI, MD, MPH Professor of Medicine Division of General Internal Medicine Yale School of Medicine Director of Psychosocial Communication Yale Primary Care Internal Medicine Residency Program New Haven, Connecticut Francesca C. Dwamena, MD, MS Professor and Chair Department of Medicine Michigan State University East Lansing, Michigan Richard M. Frankel, PhD Professor of Medicine Department of Internal Medicine Indiana University School of Medicine Senior Research Scientist, Center for Healthcare Information and Communication (CHIC) Richard L. Roudebush Veterans Affairs Medical Center Indianapolis, Indiana Education Institute Cleveland Clinic Cleveland, Ohio Brenda Lovegrove Lepisto, PsyD Director of Psychosocial Communication Hurley Medical Center Assistant Professor of Medicine Department of Internal Medicine College of Human Medicine, Michigan State University Flint, Michigan Robert C. Smith, MD, MS University Distinguished Professor Professor of Medicine and Psychiatry Division of General Internal Medicine College of Human Medicine, Michigan State University East Lansing, Michigan Disclaimer: This app is intended for the education of healthcare professionals and not as a diagnostic and treatment reference for the general population. 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

Derm DDx

This app provides visual, point-of-care guidance for diagnosing skin disorders. It features a large database of high-resolution images, allowing users to compare variations, zoom in, and access clinical history and treatment options for over 160 dermatologic conditions.

Highlights
  • 650+ high-quality dermatology images
  • Guidance for 160+ dermatologic conditions
  • Side-by-side image variations
  • Zoomable high-resolution images
  • Clinical history and treatment options
  • Cross-referencing to differential diagnoses
  • Full text search and custom notes
Features
Read full description

The Dermatology DDx app from Unbound Medicine delivers visual, point-of-care guidance for establishing the diagnosis of skin disorders. This powerful, photo-intensive database allows users to search, view side-by-side variations of each skin disorder, easily zoom in on any of the high-resolution images, and instantly link to similar conditions to ensure accurate diagnosis. Each entry also contains clinical history, physical findings, and treatment options. Features of Dermatology DDx include: • 650+ high-quality images presented with common variations in presentation • Point-of-care guidance for 160+ dermatologic conditions • Cross reference links to differential diagnoses • History and treatment within each entry • Appendix charting potencies of topical steroids • Highlight and make custom notes within entries • Full Text Search to find topics quickly • Favorites for ’bookmarking’ important entries Authors: by James G. Dinulos MD, M. Shane Chapman MD, Andrew Eugene Werchniak MD, Dorothea T. Barton MD, Thomas P. Habif MD Publisher: Elsevier Powered by: Unbound Medicine Unbound Privacy Policy: www.unboundmedicine.com/privacy Unbound Terms of Use: https://www.unboundmedicine.com/end_user_license_agreement

Screenshots

Smith's Patient Interview, 4/E4 screens
Derm DDx4 screens

Verdict

The call

The clearest difference is price: Derm DDx at Free against Smith's Patient Interview, 4/E's $59.99. Derm DDx also leads on update cadence (every 5 months vs every 30 months). Smith's Patient Interview, 4/E's advantage is in-app purchases (none vs 1) and iOS requirement (10.0 vs 15.0). On 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

Derm DDx is free to download; Smith's Patient Interview, 4/E costs $59.99 up front. Derm DDx sells 1 one-off in-app purchase. Smith's Patient Interview, 4/E asks for nothing beyond the download.

UpkeepUpdate frequency

Smith's Patient Interview, 4/E ships an update every 30 months, Derm DDx every 5 months. The most recent releases landed on December 28, 2025 and October 17, 2026 respectively.

Scorecard4 real differences · 5 level
Smith's Patient Interview, 4/E versus Derm DDx: the parameters behind the verdict, then further details
ParameterSmith's Patient Interview, 4/EDerm DDx
Price$59.99Free — better
Rating—4.3 (6 ratings) — better
Number of ratings—6 — better
Update frequencyEvery 30 monthsEvery 5 months — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.0 — better15.0
Further details — not scored
Size24 MB10 MB
Age rating17+17+
DeveloperUsatine & Erickson Media LLCUnbound Medicine, Inc.

In-app purchases

None

Smith's Patient Interview, 4/E

No in-app purchases

1 purchases

Derm DDx

One-time1
  • Dermatology DDx$69.99

Questions

Is Smith's Patient Interview, 4/E free?
Smith's Patient Interview, 4/E costs $59.99, with no in-app purchases.
Is Derm DDx free?
Derm DDx is free to download, with in-app purchases available.
Do Smith's Patient Interview, 4/E or Derm DDx have ads?
Neither Smith's Patient Interview, 4/E nor Derm DDx shows ads.
Which is updated more often, Smith's Patient Interview, 4/E or Derm DDx?
Smith's Patient Interview, 4/E ships an update every 30 months, and Derm DDx every 5 months. Most recently, Smith's Patient Interview, 4/E was updated on December 28, 2025 and Derm DDx on October 17, 2026.

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