# Diagnosaurus® DDx

> Best-selling DDx app worldwide

Canonical page: [https://chrome-stats.com/d/id833728910](https://chrome-stats.com/d/id833728910)

## Overview

- **ID:** `id833728910`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Unbound Medicine, Inc.
- **Category:** Medical
- **Rating:** 4.80 / 5 (2,484 ratings)
- **Version:** 1.13
- **Last updated:** 2026-02-20
- **First published:** 2014-03-19
- **Size:** 18 MB
- **Data as of:** 2026-09-19
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/diagnosaurus-ddx/id833728910)
- **Website:** [https://www.unboundmedicine.com/products/iphone](https://www.unboundmedicine.com/products/iphone)
- **Privacy policy:** [http://www.unboundmedicine.com/privacy](http://www.unboundmedicine.com/privacy)

## Description

Diagnosaurus DDx is a fast, quick-reference differential diagnosis tool designed for healthcare professionals at the point of care. It offers over 1,000 differential diagnoses organized by organ system, symptom, or disease, with quick-read entries and See Related DDx links to consider alternative diagnoses. The Favorites feature lets you bookmark and revisit important topics for rapid decision-making.

Free preview is available, and the app is top-selling worldwide, built to help clinicians search efficiently, annotate entries, and navigate via disease, symptom, and organ system indexes. It also includes a universal index search for fast access to answers.

## Rankings

- #36,109 — Overall

## Review summary

Diagnosaurus DDx is a popular quick-reference tool that many clinicians find helpful for rapid ddx in practice and for training. However, reviewers frequently note its limited content depth, absence of educational material, and concerns about pricing/upgrades and access issues, which undermine long-term value and reliability despite its convenience for time-critical lookups.

### Pros

- Quick, time-efficient differential diagnosis reference for use in practice (e.g., during night shifts).
- Easy to use and well-designed with a user-friendly mobile interface.
- Useful for trainees and new practitioners to augment practice, especially for vague symptoms.
- Provides rapid, essential ddx lookups that clinicians can rely on in busy settings.

### Cons

- Content is incomplete and not comprehensive, with many signs/symptoms and differential diagnoses missing.
- Lacks background information and links to explain conditions; serves mainly as a list of ddx with limited education value.
- Pricing and upgrade policy are criticized, including forced re-purchases and full-price upgrades for new versions.
- Billing/access and reliability issues reported (being billed for services not obtained, occasional non-functionality, and weak support).

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Source: [Chrome-Stats](https://chrome-stats.com/d/id833728910)