Diagnosaurus® DDx vs DynaMed
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Diagnosaurus® DDx
This medical reference tool assists healthcare professionals in performing differential diagnoses quickly and confidently. It offers a searchable database of over 1,000 diagnoses, cross-referenced for related conditions, and allows users to save favorite entries and make custom notes.
- Over 1,000 differential diagnoses
- Search by organ system, symptom, or disease
- See Related DDx feature
- Save favorite entries
- Highlight and make custom notes
- Universal Index Search
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** Top-Selling App Used by Tens of Thousands of Health Professionals, Worldwide ** ABOUT DIAGNOSAURUS DDX This quick-reference tool helps healthcare professionals perform differential diagnosis with speed and confidence at the point of care. With Diagnosaurus you can quickly search over 1,000 diagnoses by organ system, symptom, or disease, or you can view all entries. Use the valuable “See Related DDx” feature within each entry to consider alternative diagnoses and quickly link to those entries. The convenient “Favorites” feature allows you to save specific searches and bookmark in your personal archive. FEATURES • More than 1,000 differential diagnoses • Highlight and make custom notes within entries • Entries organized in quick-read format • “See Related DDx” links to other potential diagnoses • Disease, symptom, and organ system indexes • “Favorites” for bookmarking important entries • Universal Index Search to help find answers fast Author: Roni F. Zeiger, MD Publisher: McGraw-Hill Medical Powered by: Unbound Medicine
DynaMed
This tool provides clinicians with efficient, evidence-based patient care guidance. It offers timely analysis and synthesis of medical literature, updated daily by medical professionals. Mobile access ensures continuous work with syncing between desktop and mobile devices.
- Evidence-based patient care guidance
- Daily medical literature review
- Objective analysis and synthesis
- Physician-authored content
- Mobile access with syncing
- On-the-go clinical support
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DynaMed is a trusted, evidence-based clinical decision support tool designed by clinicians, for clinicians, to help make faster, more informed decisions at the point of care. Rigorous daily review of medical literature by our editorial team of expert physicians and methodologists ensures timely and objective analysis, synthesis, and guidance are always at your fingertips. Now available with Dyna AI* for faster, trusted answers to your clinical queries. Dyna AI synthesizes DynaMed content into actionable, concise responses with full transparency into source references. What You Can Do with DynaMed • Access clinically relevant answers at the point of care. • Review evidence and expert interpretation with clear transparency. • Stay current with daily updates based on ongoing literature surveillance. • Access content seamlessly across mobile and desktop experiences. • Use content online or offline. Who Can Use This App: This app is designed for physicians, advanced practice providers, nurses, pharmacists, trainees, and other healthcare professionals with access to DynaMed through their institution. Why Clinicians Choose DynaMed: DynaMed helps clinicians make informed decisions with confidence by delivering trusted evidence, expert analysis, and practical guidance wherever care happens. *Dyna AI availability is dependent on your subscription and access level.
Screenshots
Verdict
The clearest difference is in-app purchases: DynaMed at none against Diagnosaurus® DDx's 1. DynaMed also leads on update cadence (every 5 weeks vs every 10 months). Diagnosaurus® DDx's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 18.4). On price, rating, review sentiment and ratings volume 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. Diagnosaurus® DDx sells 1 one-off in-app purchase. DynaMed asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.8 for Diagnosaurus® DDx against 4.9 for DynaMed. Both are backed by a comparable volume of ratings — 2.5K and 3.5K respectively. Written reviews are what separate them: 53% of Diagnosaurus® DDx's written reviews are positive against 56% of DynaMed's.
Diagnosaurus® DDx ships an update every 10 months, DynaMed every 5 weeks. Both last shipped on September 24, 2026.
| Parameter | Diagnosaurus® DDx | DynaMed |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (2.5K ratings) | 4.9 (3.5K ratings) — better |
| Positive reviews | 53.2% of reviews | 55.6% of reviews — better |
| Number of ratings | 2.5K | 3.5K — better |
| Update frequency | Every 10 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 18.4 |
| Further details — not scored | ||
| Size | 18 MB | 37 MB |
| Age rating | 17+ | 17+ |
| Developer | Unbound Medicine, Inc. | EBSCO Publishing |
Customer experience
Diagnosaurus® DDx
DynaMed
User reviews
Diagnosaurus® DDx
From 2.5K App Store ratingsWhat we love
- 👍 User-friendly interface
- 🚀 Quick access to differential diagnoses
- 💡 Helpful for building differential diagnoses
- 👍 Comprehensive coverage of conditions
- 👍 Useful for medical students and practitioners
Room to improve
- 🐛 Lack of in-depth information
- 🐛 Incomplete differential diagnoses
- 🐛 Lack of links to explain conditions
- 🐛 Requires in-app purchase to access full content
- 🐛 Unreliable update mechanism
DynaMed
From 3.5K App Store ratingsWhat we love
- 🚀 Concise and organized information
- 🚀 More up-to-date than UpToDate
- 🚀 Comprehensive and evidence-based
- 👍 User-friendly interface
- 👍 Valuable point-of-care tool
Room to improve
- 🐛 Crashes and bugs after updates
- 🐛 Frequent login issues
- 🐛 Downloading and storage issues
- 🐛 Clunky UI, not optimized for larger screens
- 🐛 Search function glitches
Bugs and requests
Diagnosaurus® DDx
Reported bugs
3 issues- Subscription issues and inability to restore purchases
- Blank pages and non-functional content
- Compatibility issues with newer iOS versions
Requested features
5 requests- Add ability to edit or add custom differential diagnoses
- Improve search functionality and navigation
- Provide more detailed information on conditions
- Integrate with other medical resources and databases
- Improve support for older devices and iOS versions
DynaMed
Reported bugs
5 issues- App crashes on iOS 14 update
- Downloading content gets stuck in loop
- Search function not working properly
- Frequent login issues
- App not opening on some devices
Requested features
5 requests- Dark mode option
- Improved search functionality
- Better organization of content
- More patient education resources
- Smoother offline access and content management
In-app purchases
Diagnosaurus® DDx
- Diagnosaurus DDx$4.99
DynaMed
No in-app purchases









