Diagnosaurus® DDx vs PEPID®
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
PEPID®
Provides healthcare professionals with essential tools for patient care, including a vast drug database, medical calculators, and visual aids. Content is regularly updated and clinically independent, offering reliable information for various medical roles.
- Largest drug database
- Medical calculators
- High-res pill photos
- Clinical illustrations
- Regularly updated information
- Independent clinical content
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PEPID gives healthcare professionals all the tools they need to treat patients at the scene, en route and/or by the bedside. With just a few taps, access the largest drug database on the market, medical calculators, high-res pill photos, illustrations, and much more! -- Updated regularly, so you can be sure you have the most current information available -- Independent clinical content from 12 leading healthcare associations, including the American Academy of Emergency Medicine, American College of Emergency Physicians and the Family Physicians Inquiries Network -- Suites available for physicians, nurses, students, residents, pharmacists, EMTs and paramedics, and more Have questions, issues or feedback? Contact us at support@pepid.com.
Screenshots
Verdict
The clearest difference is in-app purchases: PEPID® at none against Diagnosaurus® DDx's 1. PEPID® also leads on update cadence (every 5 weeks vs every 10 months). Diagnosaurus® DDx's advantage is review sentiment (53% vs 45%) and device support (4 vs 2). On price, rating, ratings volume and ads 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. PEPID® asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.8 for Diagnosaurus® DDx against 4.7 for PEPID®. Both are backed by a comparable volume of ratings — 2.5K and 2.9K respectively. Written reviews are what separate them: 53% of Diagnosaurus® DDx's written reviews are positive against 45% of PEPID®'s.
Diagnosaurus® DDx ships an update every 10 months, PEPID® every 5 weeks. The most recent releases landed on October 17, 2026 and October 15, 2026 respectively.
| Parameter | Diagnosaurus® DDx | PEPID® |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (2.5K ratings) — better | 4.7 (2.9K ratings) |
| Positive reviews | 53.2% of reviews — better | 45.1% of reviews |
| Number of ratings | 2.5K | 2.9K — 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, iPod |
| Requires iOS | 15.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 18 MB | 39 MB |
| Age rating | 17+ | 17+ |
| Developer | Unbound Medicine, Inc. | PEPID, LLC |
Customer experience
Diagnosaurus® DDx
PEPID®
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
PEPID®
From 2.9K App Store ratingsWhat we love
- 🚀 Quick information
- 🔒 Trustworthy content
- 👍 Useful for daily work
- 👍 Comprehensive database
- 👍 User-friendly
Room to improve
- 🐛 App crashes/won't open
- 🐛 Outdated/missing content
- 🐛 Poor optimization for newer devices
- 💰 Expensive subscription
- 👎 Difficult to navigate
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
PEPID®
Reported bugs
3 issues- App crashes on login or launch
- Content fails to download
- Incompatible with newer iOS versions
Requested features
4 requests- Improved search functionality
- More calculators and tools
- Automatic content updates
- Ability to use on multiple devices with single subscription
In-app purchases
Diagnosaurus® DDx
- Diagnosaurus DDx$4.99
PEPID®
No in-app purchases
Questions
Is Diagnosaurus® DDx free?
Is PEPID® free?
Which has better reviews, Diagnosaurus® DDx or PEPID®?
Do Diagnosaurus® DDx or PEPID® have ads?
Which is updated more often, Diagnosaurus® DDx or PEPID®?
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