Comparison

Diagnosaurus® DDx vs DynaMed

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

** 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

About

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.

Highlights
  • 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
Features
Read full description

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

Diagnosaurus® DDx4 screens
DynaMed4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Diagnosaurus® DDx sells 1 one-off in-app purchase. DynaMed asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

Diagnosaurus® DDx ships an update every 10 months, DynaMed every 5 weeks. Both last shipped on September 24, 2026.

Scorecard5 real differences · 5 level
Diagnosaurus® DDx versus DynaMed: the parameters behind the verdict, then further details
ParameterDiagnosaurus® DDxDynaMed
PriceFreeFree
Rating4.8 (2.5K ratings)4.9 (3.5K ratings) — better
Positive reviews53.2% of reviews55.6% of reviews — better
Number of ratings2.5K3.5K — better
Update frequencyEvery 10 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS15.0 — better18.4
Further details — not scored
Size18 MB37 MB
Age rating17+17+
DeveloperUnbound Medicine, Inc.EBSCO Publishing

Customer experience

Diagnosaurus® DDx

All ratings2,485 ratings
Positive96.2%
Neutral1.6%
Negative2.2%
Written reviews77 reviews
Positive53.2%
Neutral2.6%
Negative44.2%

DynaMed

All ratings3,522 ratings
Positive98.1%
Neutral0.9%
Negative1.0%
Written reviews133 reviews
Positive55.6%
Neutral6.8%
Negative37.6%

User reviews

Diagnosaurus® DDx

From 2.5K App Store ratings

What 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 ratings

What 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

1 purchases

Diagnosaurus® DDx

One-time1
  • Diagnosaurus DDx$4.99
None

DynaMed

No in-app purchases

Questions

Is Diagnosaurus® DDx free?
Diagnosaurus® DDx is free to download, with in-app purchases available.
Is DynaMed free?
DynaMed is free to download, with no in-app purchases.
Which has better reviews, Diagnosaurus® DDx or DynaMed?
DynaMed is rated higher. Diagnosaurus® DDx averages 4.8 out of 5 from 2.5K ratings, while DynaMed averages 4.9 from 3.5K ratings.
Do Diagnosaurus® DDx or DynaMed have ads?
Neither Diagnosaurus® DDx nor DynaMed shows ads.
Which is updated more often, Diagnosaurus® DDx or DynaMed?
Diagnosaurus® DDx ships an update every 10 months, and DynaMed every 5 weeks. Most recently, Diagnosaurus® DDx was updated on September 24, 2026 and DynaMed on September 24, 2026.

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