Comparison

EBMcalc G.I. vs CTisus CT Quick Guides

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

Head to head
About

EBMcalc G.I.

Features
Read full description

EBMcalc G.I. EBMcalc is the most popular and comprehensive Medical Calculator system on the web. It has been highly acclaimed, reviewed and tested over the last 25 years. EBMcalc users should not make any medical decisions based on app content without seeking their doctor's advice. EBMcalc G.I. encompasses numerous medical equations, clinical criteria sets, decision tree tools and dose/unit converters used every day by Gastroenterology specialists. With the growing emphasis on Evidence-Based Medicine, there has never been a greater need for a system such as EBMcalc. Equations included: Ascites Albumin Gradient Fractional Excretion of Amylase (Amylase to creatinine clearance ratio) Hepatitis C Fibrosis Prediction Score MELD Score for End-Stage Liver Disease (NOT appropriate for patients under the age of 12) (SI units) MELD Score for End-Stage Liver Disease (NOT appropriate for patients under the age of 12) MELDNa Score for End-Stage Liver Disease (NOT appropriate for patients under the age of 12) (SI units) MELDNa Score for End-Stage Liver Disease (NOT appropriate for patients under the age of 12) Mortality risk in post-operative patients with cirrhosis (SI units) Mortality risk in post-operative patients with cirrhosis PELD Score for End-Stage Liver Disease (patients less than 12 years old) Stool Osmolal Gap TIPS Risk predictor / Survival predictor (Transjugular Intrahepatic Portosystemic Shunt) Clinical Criteria Sets included: Acetaminophen (Paracetamol) Toxicity Assessment Alcoholic Liver Disease Combined Index (Clinical and Laboratory -- CCLI) Criteria for One Year Mortality Prognosis Alcoholic Liver Disease: Criteria for One Year Mortality Prognosis Autoimmune Hepatitis Diagnostic Criteria Bedside index of severity in acute pancreatitis (BISAP) score Blatchford Score for Gastrointestinal Bleeding Bowel Obstruction Diagnosis: Utility of X-ray Child Pugh Classification for Severity of Liver Disease (SI units) Child Pugh Classification for Severity of Liver Disease Cirrhosis Probability in Hepatitis C (6 models) Crohn's disease activity index (CDAI) Esophageal Varices: Prediction from Platelet Count to Spleen Diameter Ratio Glasgow alcoholic hepatitis score Harvey-Bradshaw index of Crohn's disease activity Hepatitis C Cirrhosis Probability Hepatitis Discriminant Function for Corticosteroid Therapy in Alcoholic Hepatitis Irritable Bowel Syndrome Diagnostic Criteria (Manning Criteria) Lower GI Bleeding and Risk of Severe Bleeding Mayo Score for Assessing Ulcerative Colitis Activity Nonbiliary Cirrhosis Prognostic Criteria for One Year Survival Omeprazole Therapeutic Gain (over placebo) in Dyspepsia Omeprazole Therapeutic Index in Dyspepsia Pancreatitis Prognosis Criteria When Disease Due To Gallstones Pancreatitis Prognosis Criteria Rockall Score for Upper Gastrointestinal Bleeding Decision Trees included: Barrett Esophagus Progression Risk TreeCalc Hepatitis C Outcome TreeCalc NASH Fibrosis Risk (Nonalcoholic Steatohepatitis) TreeCalc Unit and Dose Converters include: Area Unit Conversions Basic Unit Conversions Comprehensive Unit Conversions Corticosteroid Medication Dosing Conversions (glucocorticoid effect) Corticosteroid Medication Dosing Conversions (mineralocorticoid effect) Density Unit Conversions Energy Unit Conversions Fentanyl Patch Initial Dosing Estimate Based on Prior Narcotic Dosing Flow Unit Conversions Force Unit Conversions Length Unit Conversions Opioid Medication Dose Conversions Oxygen Delivery Units Conversions Power Unit Conversions Pressure Unit Conversions SI Unit Conversions (multiple) Speed Unit Conversions Standard Drink Equivalents Temperature Unit Conversions Textile Type Unit Conversions Thyroid Medication Dosing Conversions Time Unit Conversions Volume Unit Conversions Weight Unit Conversions To practice, teach and learn medicine based on solid, literature based evidence, EBMcalc provides easy to use, interactive tools for your Evidence-Based Medicine.

About

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.

Highlights
  • Curated CT images
  • Imaging pearls
  • Clinical findings
  • 17 topic sections
  • Critical CT findings
  • Etiology, epidemiology, presentation, prognosis
Features
Read full description

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

EBMcalc G.I.4 screens
CTisus CT Quick Guides4 screens

Verdict

The call

The clearest difference is price: CTisus CT Quick Guides at Free against EBMcalc G.I.'s $4.99. CTisus CT Quick Guides also leads on update cadence (every 6 months vs every 33 months). EBMcalc G.I.'s advantage is iOS requirement (10.0 vs 16.6). On ads, in-app purchases and device support 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

CTisus CT Quick Guides is free to download; EBMcalc G.I. costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

EBMcalc G.I. ships an update every 33 months, CTisus CT Quick Guides every 6 months. The most recent releases landed on October 13, 2026 and October 8, 2026 respectively.

Scorecard3 real differences · 6 level
EBMcalc G.I. versus CTisus CT Quick Guides: the parameters behind the verdict, then further details
ParameterEBMcalc G.I.CTisus CT Quick Guides
Price$4.99Free — better
Rating—4.8 (4 ratings) — better
Number of ratings—4 — better
Update frequencyEvery 33 monthsEvery 6 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS10.0 — better16.6
Further details — not scored
Size3 MB52 MB
Age rating17+17+
DeveloperFoundation Internet Services, LLCElliot Fishman

In-app purchases

None

EBMcalc G.I.

No in-app purchases

None

CTisus CT Quick Guides

No in-app purchases

Questions

Is EBMcalc G.I. free?
EBMcalc G.I. costs $4.99, with no in-app purchases.
Is CTisus CT Quick Guides free?
CTisus CT Quick Guides is free to download, with no in-app purchases.
Do EBMcalc G.I. or CTisus CT Quick Guides have ads?
Neither EBMcalc G.I. nor CTisus CT Quick Guides shows ads.
Which is updated more often, EBMcalc G.I. or CTisus CT Quick Guides?
EBMcalc G.I. ships an update every 33 months, and CTisus CT Quick Guides every 6 months. Most recently, EBMcalc G.I. was updated on October 13, 2026 and CTisus CT Quick Guides on October 8, 2026.

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