# Diagnosaurus® DDx vs Bullets*

The clearest difference is rating: Diagnosaurus® DDx at 4.8 against Bullets*'s 4.0. Diagnosaurus® DDx also leads on ratings volume (2.5K vs 62). Bullets*'s advantage is in-app purchases (none vs 1) and update cadence (every 8 days vs every 10 months). 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. Bullets* asks for nothing beyond the download.

Diagnosaurus® DDx holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Diagnosaurus® DDx has 2.5K ratings behind it against 62, so its average is the more settled of the two. Written reviews complicate that: 53% of Diagnosaurus® DDx's written reviews are positive against 68% of Bullets*'s, so the app with the better star average is not the one people write more warmly about.

Diagnosaurus® DDx ships an update every 10 months, Bullets* every 8 days. Both last shipped on October 26, 2026.

## The numbers

| Metric | Diagnosaurus® DDx | Bullets* |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (2.5K ratings)](https://appshunter.io/ios/app/diagnosaurus-ddx/id833728910/reviews)** | [4.0 (62 ratings)](https://appshunter.io/ios/app/bullets/id1046432285/reviews) |
| Number of ratings | **2.5K** | 62 |
| Positive reviews | 53.2% of reviews | **67.6% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 8 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 19 MB | 168 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Unbound Medicine, Inc.](https://appshunter.io/developer/300420400) | [LineageMedical Inc](https://appshunter.io/developer/1046432134) |

## 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


### Bullets*

[App page](https://appshunter.io/ios/app/bullets/id1046432285)

Access medical and orthopedic educational content, including topics, questions, and cases. Create custom exams, review scientific articles, and monitor community activity. Earn CME credits through self-assessment exams and collaborative learning.

**Highlights:** Medical and orthopedic topics, Customizable exams (Testmaster), Article review with PDFs, Community activity feed, Earn CME credits, Point of Care Learning (PoCL)

**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 Bullets* free?

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

### Which has better reviews, Diagnosaurus® DDx or Bullets*?

Diagnosaurus® DDx is rated higher. Diagnosaurus® DDx averages 4.8 out of 5 from 2.5K ratings, while Bullets* averages 4.0 from 62 ratings.

### Do Diagnosaurus® DDx or Bullets* have ads?

Neither Diagnosaurus® DDx nor Bullets* shows ads.

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

Diagnosaurus® DDx ships an update every 10 months, and Bullets* every 8 days. Most recently, Diagnosaurus® DDx was updated on October 26, 2026 and Bullets* on October 26, 2026.

---

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