Diagnosaurus® DDx vs EndDate
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
EndDate
Calculate future dates based on a start date and duration. Useful for medical professionals to determine vaccination schedules and medication treatment end dates.
- Calculate end dates from start date and duration
- Determine vaccination dose dates
- Calculate medication treatment end dates
- Tool for physicians and pharmacists
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Easily calculate an end date from a start date and duration in a calendar. Determine recommended dosing dates for vaccinations. EndDate is a tool for physicians and pharmacists calculating the end dates of treatment for medications as well as dates for vaccination doses.
Screenshots
Verdict
The clearest difference is review sentiment: EndDate at 100% against Diagnosaurus® DDx's 53%. EndDate also leads on in-app purchases (none vs 1) and update cadence (daily vs every 10 months). Diagnosaurus® DDx's advantage is ratings volume (2.5K vs 4). On price, 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
Both are free to download. Diagnosaurus® DDx sells 1 one-off in-app purchase. EndDate asks for nothing beyond the download.
EndDate holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Diagnosaurus® DDx has 2.5K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 53% of Diagnosaurus® DDx's written reviews are positive against 100% of EndDate's.
Diagnosaurus® DDx ships an update every 10 months, EndDate daily. The most recent releases landed on October 20, 2026 and September 10, 2026 respectively.
| Parameter | Diagnosaurus® DDx | EndDate |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (2.5K ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 53.2% of reviews | 100.0% of reviews — better |
| Number of ratings | 2.5K — better | 4 |
| Update frequency | Every 10 months | Daily — 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, iPod |
| Requires iOS | 15.0 | 12.1 — better |
| Further details — not scored | ||
| Size | 19 MB | 1 MB |
| Age rating | 17+ | 12+ |
| Developer | Unbound Medicine, Inc. | Eugene Liu |
Customer experience
Diagnosaurus® DDx
EndDate
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
EndDate
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Diagnosaurus® DDx
- Diagnosaurus DDx$4.99
EndDate
No in-app purchases
Questions
Is Diagnosaurus® DDx free?
Is EndDate free?
Which has better reviews, Diagnosaurus® DDx or EndDate?
Do Diagnosaurus® DDx or EndDate have ads?
Which is updated more often, Diagnosaurus® DDx or EndDate?
Other comparisons
