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Diagnosaurus® DDx

Diagnosaurus® DDx

Best-selling DDx app worldwide

2.5K ratings
72 reviews
💪 Health & Fitness
🏥 Medical
Free
In-App Purchases

Details

  • Released
  • Updated
  • March 19, 2014
  • February 20, 2026

Features

Developer

Unbound Medicine, Inc.
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iphone
ipad
🧾$4.99
In-App Purchase↘︎
📌Ready
Reviews summary↘︎
⭐72
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📝12+ tags
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🔄6+ apps
Alternatives↘︎
❓5 answered
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📦~ in 10 months
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About

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
Show original description

What users say

Summarized from real user reviews of Diagnosaurus® DDx. Based on 2.5K reviews and a 4.8/5 average, it highlights the 5 positives and 5 negatives reviewers mention most about this Medical app.

Positive things

  • 👍User-friendly interface
  • 🚀Quick access to differential diagnoses
  • 💡Helpful for building differential diagnoses
  • 👍Comprehensive coverage of conditions
  • 👍Useful for medical students and practitioners

Negative things

  • 🐛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
See all reviews

What's New in Diagnosaurus® DDx

1.13

February 20, 2026

We’ve upgraded our purchase process. We implemented Apple’s latest payment technology to make buying and restoring purchases smoother than ever. - Instant Access: Your premium features unlock immediately after purchase. - Better Reliability: No more "Restore Purchase" errors. - Seamless Management: Easier control over your subscription status directly within the app If you have any questions or feedback, please contact Unbound Medicine Support.

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In-App Purchases

$4.99

Diagnosaurus DDx

This quick-reference tool helps healthcare professionals perform differential diagnosis with speed and confidence at the point of care.

User reviews

Most RecentHighest RatedLowest Rated

Good

I use it a lot for practicals. They want a differential diagnosis, I can think of many from this app only.
HandsomeStallionHandsomeStallion

Response from developer

Thank you for your review. We are pleased to hear that the app serves as a valuable resource for your practicals and assists you with differential diagnoses. If you ever have questions or need assistance in the future, please contact us at support@unboundmedicine.com.

The Best App

I have used the app since 2000 and find it extremely useful.
Jsw HuangJsw Huang

Marginal

Pregnancy is listed as a disease. It is not! Poor app!
NoNoviceDocNoNoviceDoc

Very helpful

For years, I have used Diagnosaurus as an aid in practice and in teaching my medical students.
Rain Dr.Rain Dr.

Response from developer

Thank you so much for being such a loyal customer and for taking the time to leave us such a positive review. We love knowing that our apps are part of your day at work and in the classroom. Thanks again!

Marginal

Lacks in-depth info
NoNoviceDocNoNoviceDoc
See 67 more reviews

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User experience

🐞

Reported Bugs

3 issues

Subscription issues and inability to restore purchases

Bug

Blank pages and non-functional content

Bug

Compatibility issues with newer iOS versions

Bug
✨

Requested Features

5 requests

Add ability to edit or add custom differential diagnoses

Feature

Improve search functionality and navigation

Feature

Provide more detailed information on conditions

Feature

Integrate with other medical resources and databases

Feature

Improve support for older devices and iOS versions

Feature

FAQ

What is Diagnosaurus DDx?

Diagnosaurus DDx is a quick-reference tool designed for healthcare professionals to assist with differential diagnosis. It provides access to over 1,000 diagnoses, organized by organ system, symptom, or disease, enabling users to quickly explore potential conditions.

What are the key features of Diagnosaurus DDx?

Key features include a database of over 1,000 differential diagnoses, the ability to search by organ system, symptom, or disease, and a 'See Related DDx' function to explore alternative diagnoses. Users can also highlight entries, make custom notes, and save important entries to a 'Favorites' list.

How much does Diagnosaurus DDx cost?

The application is free to download and use, but it does offer in-app purchases and may display advertisements. Specific features or content might be unlocked through these purchases.

Who is the target audience for Diagnosaurus DDx?

This app is intended for healthcare professionals, such as physicians, who need a fast and reliable tool for differential diagnosis at the point of care. It helps them consider a wide range of potential diagnoses efficiently.

How does the 'See Related DDx' feature work?

The 'See Related DDx' feature within each diagnosis entry allows users to quickly view and link to other potential diagnoses that are related. This helps in considering alternative possibilities and broadening the differential diagnosis process.