Comparison

Differential Diagnosis | DDx vs Casemate

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

Head to head
About

Differential Diagnosis | DDx

Master clinical reasoning and diagnostic precision with a comprehensive guide to symptoms, signs, and conditions. This app offers evidence-based algorithms, interactive case studies, and detailed investigation plans to sharpen diagnostic skills for healthcare professionals.

Highlights
  • Symptom-based differential diagnosis library
  • Evidence-based diagnostic algorithms
  • Targeted history taking
  • Clinical examination guidance
  • Investigation plans
  • Interactive case studies
Features
Read full description

Welcome to Differential Diagnosis | DDx: Your Comprehensive Guide to Clinical Reasoning and Diagnostic Precision! Differential Diagnosis is your ultimate resource for mastering clinical reasoning and sharpening your diagnostic expertise. Designed for doctors, medical students, residents, and healthcare practitioners, this app provides a dynamic learning experience that empowers you to make accurate, evidence-based diagnoses. Explore an extensive database of symptoms, signs, and conditions, meticulously curated to simulate real-world clinical scenarios. From common presentations to rare diseases, Differential Diagnosis helps you build a structured approach to identifying underlying conditions and formulating comprehensive differential lists. Our intuitive interface enables seamless navigation through symptoms and systems, Lab tests accompanied by detailed explanations, algorithms, and key diagnostic criteria to enhance your clinical acumen. Engage in interactive case studies to apply your knowledge and receive personalized feedback. Test yourself with complex clinical vignettes and track your progress as you refine your diagnostic skills. Key Features: - Comprehensive symptom-based differential diagnosis library. - Evidence-based diagnostic algorithms and criteria. - Targeted History Taking & Clinical Examination - General & Specific Investigation Plans for Each Case Whether you're a medical student building your foundation or an experienced clinician looking to stay sharp, Differential Diagnosis DDx is your trusted companion for mastering clinical diagnostics. Download now and take your diagnostic skills to the next level! Developed by RER MedApps For inquiries, contact us at contact@rermedapps.com Terms of Use: https://rermedapps.com/terms-of-use Privacy Policy: https://rermedapps.com/privacy-policy

About

Casemate

Practice patient history-taking with an AI-powered voice simulator. Receive detailed feedback on your questioning, clinical reasoning, and communication skills based on established frameworks. Track your progress over time with objective grading and links to relevant study materials.

Highlights
  • AI-powered patient encounters
  • Voice-first interaction
  • OSCE-style grading rubric
  • Cited feedback with transcript quotes
  • History and trend tracking
  • Links to study resources
Features
Read full description

Casemate is a voice-first practice tool for medical, PA, and NP students who want real reps at taking a history. You pick a chief complaint, tap Start, and talk to a patient. The patient talks back. When you finish, an OSCE-style rubric — informed by the published consensus frameworks for clinical communication (Kalamazoo, Calgary-Cambridge, Four Habits) — grades you on what you asked, what you missed, and how you communicated, with quotes from your own transcript to back up every point. What's inside v1.0 - 150 cases across 30 chief complaints (chest pain, abdominal pain, headache, shortness of breath, joint pain, dizziness, and more). Each complaint ships five variants spanning beginner, intermediate, and advanced difficulty. - Voice-first encounters. No typing — you talk the way you would in clerkship. - A four-dimension rubric (history, clinical reasoning, communication, patient safety) with every criterion tagged by framework lineage — Kalamazoo, Calgary-Cambridge, Four Habits, or ICE — so you can trace what you're being graded against. Overall score weighs patient safety double. - Cited feedback. Every criterion points at a timestamp and a direct quote from your transcript. - History and trend tracking so you can see your score curve over time. - "Study this" links at the end of every encounter to the primary-source reference you likely need. Built for trainees, not patients. Every patient you meet is AI-generated. Nothing in this app is medical advice, a diagnostic tool, or a substitute for supervised training. We confirm this at onboarding and reinforce it on every report. Age 17 or older; trainees only. Your privacy - Anonymous by default — no login required. - No voice recordings are stored. Audio is transcribed in real time and the audio itself is discarded. - You can request deletion of your server-side transcripts at any time. Pricing Every new account starts with a 7-day free trial with full access — no payment info required. After the trial, Casemate Pro is $9.99/month or $89.99/year (about $7.50/month). Subscriptions renew automatically until cancelled in your App Store account settings. Feedback welcome at alichah414@gmail.com. Terms of Use: https://alichahbandar.github.io/casemate-legal/terms.html Privacy Policy: https://alichahbandar.github.io/casemate-legal/privacy.html

Screenshots

Differential Diagnosis | DDx4 screens
Casemate4 screens

Verdict

The call

The clearest difference is rating: Casemate at 5.0 against Differential Diagnosis | DDx's 1.0. Casemate also leads on ratings volume (3 vs 1). Differential Diagnosis | DDx's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 17.6). On price, ads, in-app purchases and monetization model 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. Differential Diagnosis | DDx sells 4 in-app purchases, starting at $2.99 per month and Casemate sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Casemate holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Scorecard4 real differences · 6 level
Differential Diagnosis | DDx versus Casemate: the parameters behind the verdict, then further details
ParameterDifferential Diagnosis | DDxCasemate
PriceFreeFree
Rating1.0 (1 ratings)5.0 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings13 — better
Update frequency—Fortnightly
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.0 — better17.6
Further details — not scored
Size71 MB39 MB
Age rating17+17+
DeveloperRER MedAppsALI KHALED CHAHBANDAR

In-app purchases

4 purchases

Differential Diagnosis | DDx

Subscriptions2
  • Premium Monthly$2.991 Month
  • Premium Yearly3 Days trial$19.991 Year
One-time2
  • Lifetime Premium$24.99
  • Premium Lifetime$49.99
2 purchases

Casemate

Subscriptions2
  • Casemate Pro Monthly$9.991 Month
  • Casemate Pro Yearly$89.991 Year

Questions

Is Differential Diagnosis | DDx free?
Differential Diagnosis | DDx is free to download, with in-app purchases available.
Is Casemate free?
Casemate is free to download, with in-app purchases available.
Which has better reviews, Differential Diagnosis | DDx or Casemate?
Casemate is rated higher. Differential Diagnosis | DDx averages 1.0 out of 5 from 1 ratings, while Casemate averages 5.0 from 3 ratings.
Do Differential Diagnosis | DDx or Casemate have ads?
Neither Differential Diagnosis | DDx nor Casemate shows ads.

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