# Diagnosaurus® DDx vs EndDate

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.

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.

## The numbers

| Metric | Diagnosaurus® DDx | EndDate |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (2.5K ratings)](https://appshunter.io/ios/app/diagnosaurus-ddx/id833728910/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/enddate/id1485135665/reviews)** |
| Number of ratings | **2.5K** | 4 |
| Positive reviews | 53.2% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 months | **Daily** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 19 MB | 1 MB |
| Requires iOS | 15.0 | **12.1** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Unbound Medicine, Inc.](https://appshunter.io/developer/300420400) | [Eugene Liu](https://appshunter.io/developer/974443750) |

## What reviewers say

### Diagnosaurus® DDx

[App page](https://appshunter.io/ios/app/diagnosaurus-ddx/id833728910)

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:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Diagnosaurus DDx | $4.99 | one-time |

**What reviewers like**

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

**What reviewers complain about**

- 🐛 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

**Reported bugs**

- Subscription issues and inability to restore purchases
- Blank pages and non-functional content
- Compatibility issues with newer iOS versions

**Requested features**

- 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

[App page](https://appshunter.io/ios/app/enddate/id1485135665)

Calculate future dates based on a start date and duration. Useful for medical professionals to determine vaccination schedules and medication treatment end dates.

**Highlights:** Calculate end dates from start date and duration, Determine vaccination dose dates, Calculate medication treatment end dates, Tool for physicians and pharmacists

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Diagnosaurus® DDx free?

Diagnosaurus® DDx is free to download, with in-app purchases available.

### Is EndDate free?

EndDate is free to download, with no in-app purchases.

### Which has better reviews, Diagnosaurus® DDx or EndDate?

EndDate is rated higher. Diagnosaurus® DDx averages 4.8 out of 5 from 2.5K ratings, while EndDate averages 5.0 from 4 ratings.

### Do Diagnosaurus® DDx or EndDate have ads?

Neither Diagnosaurus® DDx nor EndDate shows ads.

### Which is updated more often, Diagnosaurus® DDx or EndDate?

Diagnosaurus® DDx ships an update every 10 months, and EndDate daily. Most recently, Diagnosaurus® DDx was updated on October 20, 2026 and EndDate on September 10, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*