Differential Diagnosis Guide vs CTisus CT Quick Guides
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Differential Diagnosis Guide
This app helps medical professionals and students review differential diagnoses for chest CT findings. It offers a powerful search tool and curated lists to explore diseases and their common imaging presentations, complete with over 100 CT images.
- Review differential diagnoses for chest CT findings
- Discover common CT imaging presentations
- Search hundreds of diseases and imaging findings
- Browse differential diagnosis lists by organ system
- Includes over 100 curated CT images
- Voice recognition search
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Thoracic Radiology Differential Diagnosis Guide is a convenient way to review differential diagnoses for chest CT findings and discover common CT imaging presentations associated with many diseases. Explore hundreds of diseases and imaging findings using the powerful search tool or browse through countless meticulously curated differential diagnosis lists by alphabetical order or by organ system. Includes over 100 meticulously curated CT images. An invaluable resource for radiologists, residents, fellows, and medical students at an unmatched price. Browse · Nearly 80 different top thoracic radiology differential diagnosis lists · Broad range of differential diagnoses encompassing: lung, pleura, heart, mediastinum, lymphatics, and large airways · Carefully curated, ranked, and practical differential diagnosis lists for the real world · Superb CT images help illustrate different CT imaging patterns · Browse differential diagnoses in alphabetical order or by organ system Discover · Powerful search tool accepts a broad range of imaging feature descriptions and will retrieve pertinent differential diagnosis lists · Search feature can accept a broad range of disease terms and retrieve a list of various differential diagnosis in which the disease appears - a great way to discover the range of imaging features that may be associated with a disease · Simplify discovery by using voice recognition in the Search field! Requirements · Requires a device with iOS 8 · Voice recognition in Search tab requires active internet connection
CTisus CT Quick Guides
This medical reference app provides radiologists and other healthcare professionals with curated CT images, imaging pearls, and clinical findings across 17 diverse topics. Key information is organized into critical findings, etiology, epidemiology, presentation, and prognosis for each subject.
- Curated CT images
- Imaging pearls
- Clinical findings
- 17 topic sections
- Critical CT findings
- Etiology, epidemiology, presentation, prognosis
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CTisus CT Quick Guides is a unique application that combines select CT images with imaging pearls and important clinical findings across a range of topics important to the radiologist and other medical professionals. The topics are varied and divided into 17 unique sections ranging from the adrenal gland to the vascular system. In each section there are multiple topics ranging from infectious and inflammatory disease to oncology. In each section key information is divided into subsections including the critical CT findings, etiology, epidemiology, presentation and prognosis. We will continue to expand these modules which have won praise from our users especially as they are shared on our social media pages. Please let us know what additional topics you would like covered and any feedback on how we can improve the application. We hope you find it an important educational experience.
Screenshots
Verdict
The clearest difference is rating: CTisus CT Quick Guides at 4.8 against Differential Diagnosis Guide's 4.5. Differential Diagnosis Guide's advantage is ratings volume (23 vs 6) and iOS requirement (8.0 vs 16.6). On price, update cadence, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
CTisus CT Quick Guides holds the better App Store score, 4.8 against 4.5. Both are backed by a comparable volume of ratings — 23 and 6 respectively.
Differential Diagnosis Guide ships an update every 4 months, CTisus CT Quick Guides every 6 months. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.
| Parameter | Differential Diagnosis Guide | CTisus CT Quick Guides |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (23 ratings) | 4.8 (6 ratings) — better |
| Positive reviews | 93.3% of reviews | — |
| Number of ratings | 23 — better | 6 |
| Update frequency | Every 4 months — better | Every 6 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 48 MB | 52 MB |
| Age rating | 12+ | 17+ |
| Developer | RADIOLOGiQ, LLC | Elliot Fishman |
Customer experience
Differential Diagnosis Guide
CTisus CT Quick Guides
In-app purchases
Differential Diagnosis Guide
No in-app purchases
CTisus CT Quick Guides
No in-app purchases
Questions
Is Differential Diagnosis Guide free?
Is CTisus CT Quick Guides free?
Which has better reviews, Differential Diagnosis Guide or CTisus CT Quick Guides?
Do Differential Diagnosis Guide or CTisus CT Quick Guides have ads?
Which is updated more often, Differential Diagnosis Guide or CTisus CT Quick Guides?
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