Comparison

Diagnosaurus® DDx vs Cortex Referral

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

** 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

About

Cortex Referral

Features
Read full description

Cortex Referral is the official provider app for Cortex Neurovascular — refer patients for TEMMA (Targeted Embolization for Migraine Management), a drug-free, minimally invasive procedure for severe migraine. REFER PATIENTS IN MINUTES • Scan a demographic sheet to auto-extract information — no manual data entry • Enter a clinical note with your referral reasoning • Submit referrals directly to Cortex from your phone TRACK REFERRAL STATUS • See all your referrals in one dashboard • Real-time status updates: Received → Scheduled → Complete • Tap any referral for details and appointment info TEMMA CLINICAL REFERENCE • What is TEMMA? Mechanism, key statistics, and who performs it • The 4-step procedure pathway: consult → lidocaine → embolization → recovery • Patient selection criteria — who to refer and when • Evidence base with 7 PubMed-linked studies • Safety profile and complication rates • Provider FAQ: insurance, medication continuation, follow-up CONTACT & LOCATIONS • One-tap call or instant message to Cortex • Interactive map with Cortex clinic locations • Get directions to any location SECURE ACCESS • Email + 6-digit verification code authentication • All data transmitted over encrypted connections Cortex Neurovascular is a specialty neurovascular practice. For more information, visit www.cortexneurovascular.com

Screenshots

Diagnosaurus® DDx4 screens
Cortex Referral3 screens

Verdict

The call

The clearest difference is in-app purchases: Cortex Referral at none against Diagnosaurus® DDx's 1. Cortex Referral also leads on update cadence (monthly vs every 10 months). On price, ads, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Diagnosaurus® DDx sells 1 one-off in-app purchase. Cortex Referral asks for nothing beyond the download.

UpkeepUpdate frequency

Diagnosaurus® DDx ships an update every 10 months, Cortex Referral monthly. The most recent releases landed on October 20, 2026 and October 10, 2026 respectively.

Scorecard2 real differences · 8 level
Diagnosaurus® DDx versus Cortex Referral: the parameters behind the verdict, then further details
ParameterDiagnosaurus® DDxCortex Referral
PriceFreeFree
Rating4.8 (2.5K ratings) — better—
Positive reviews53.2% of reviews—
Number of ratings2.5K — better—
Update frequencyEvery 10 monthsMonthly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size19 MB52 MB
Age rating17+17+
DeveloperUnbound Medicine, Inc.Cortex Neurovascular South Sound PLLC

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

Cortex Referral

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Diagnosaurus® DDx

One-time1
  • Diagnosaurus DDx$4.99
None

Cortex Referral

No in-app purchases

Questions

Is Diagnosaurus® DDx free?
Diagnosaurus® DDx is free to download, with in-app purchases available.
Is Cortex Referral free?
Cortex Referral is free to download, with no in-app purchases.
Do Diagnosaurus® DDx or Cortex Referral have ads?
Neither Diagnosaurus® DDx nor Cortex Referral shows ads.
Which is updated more often, Diagnosaurus® DDx or Cortex Referral?
Diagnosaurus® DDx ships an update every 10 months, and Cortex Referral monthly. Most recently, Diagnosaurus® DDx was updated on October 20, 2026 and Cortex Referral on October 10, 2026.

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