Comparison

EBMcalc Pulmonary vs ShockRef

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

Head to head
About

EBMcalc Pulmonary

This medical calculator provides pulmonary specialists with essential formulas, clinical criteria, and decision tools for daily use. It includes a wide range of calculations for lung function, gas exchange, and disease prediction. Users should always consult a doctor before making medical decisions based on the app's content.

Highlights
  • Pertinent medical formulae
  • Clinical criteria sets
  • Decision tree tools
  • Dose/unit converters
  • Pulmonary specialist tools
  • Lung function calculations
Features
Read full description

EBMcalc Pulmonary 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 Pulmonary encompasses pertinent medical formulae, clinical criteria sets, decision tree tools and dose/unit converters used every day by Pulmonary specialists. Equations included: A-a Gradient a/A Ratio AaPO2 Correction for FIO2 Base Excess Determination Carbon Dioxide Production Closing Capacity to Total Lung Volume Capacity Closing Capacity Closing Volume to Vital Capacity Ratio Diffusing capacity for carbon monoxide (DLCO) corrected for anemia Epoprostenol (Flolan) Infusion Rate Calculator Functional Residual Capacity Henderson-Hasselbach Equation In-Flight PaO2 Estimation (using PFT's) In-Flight PaO2 Estimation Inspiratory Capacity International Normalized Ratio of Prothrombin Time (INR) Lung Age Estimation for Smoking Cessation Counseling Lung Volume Multicalc Mean Vascular Pressure (systemic or pulmonary) Nasal Canula Oxygen Fractional Inspired O2 (FIO2) Estimate Oxygen Consumption Oxygen Content of Arterial Blood Oxygen Content of Venous Blood Oxygen Saturation Estimate from PO2 Oxygenation Index (OI) paO2 / FIO2 Ratio (for MODS Calculation) PaO2 Correction for FIO2 Peak Expiratory Flow Prediction Peak Expiratory Flow Variability in Asthma PFT Adjusted Predicted Values for Men MultiCalc PFT Adjusted Predicted Values for Women MultiCalc PFT Predicted Values for Boys MultiCalc PFT Predicted Values for Girls MultiCalc PFT Predicted Values for Men MultiCalc PFT Predicted Values for Women MultiCalc Pneumothorax Degree of Collapse Predicted postoperative FEV1 following lung resection surgery (anatomic method) Predicted postoperative FEV1 following lung resection surgery (perfusion method) Pulmonary Vascular Resistance Residual Volume to Total Lung Capacity Ratio Respiratory Quotient Right to Left Shunt Fraction Qs/Qt Systemic Vascular Resistance Total Lung Capacity Ventilation Index Vital Capacity Winter's Formula for Expected PCO2 Clinical Criteria Sets included: 6-Year Lung Cancer Risk Estimation in Current and Past Smokers APACHE II Scoring Systems (with and without diagnosis) BAP-65 prediction of in-hospital mortality and need for mechanical ventilation in COPD Bleeding Risk (any bleeding complication) on Warfarin Therapy Bleeding Risk (major complication) on Warfarin Therapy BODE Index for COPD Survival Prediction Clinical Pulmonary Infection Score (CPIS) Community-Acquired Pneumonia Severity Index (PSI) for Adults CURB Pneumonia Severity Score CURB-65 Pneumonia Severity Score DVT Probability (5 models) Epworth Sleepiness Scale (ESS) Gurd's Diagnostic Criteria for Fat Embolism Syndrome Lung Cancer One Year Risk Estimation (for smokers 50-75 years old) MODS Score: Multiple Organ Dysfunction Mycoplasma Pneumoniae Prediction in Children with Pneumonia Padua Score for Assessing Venous Thromboembolism Risk in Hospitalized Patients Pneumonia Mortality Prediction (4 models) Pneumonia Probability in Nursing Home Patients Pneumonia Risk in Post Operative Period of Non-Cardiac Surgery Polycythemia Vera Diagnostic Criteria Pulmonary Embolism Risk and Severity (4 calculators) Pulmonary Fibrosis Survival Prediction (2 models) SARS Prognosis Predictor (2 models) SMART COP and SMRT CO Scores for Pneumonia Severity Solitary pulmonary nodule malignancy risk (5 models) Tuberculosis Risk Prediction Decision Trees included: Anthrax Screening for Exposed Patients Arterial Blood Gas Interpretation Asthma Hospitalization One Year Risk Mycoplasma Pneumoniae Prediction SARS (Severe Acute Respiratory Distress Syndrome) CDC Case Definition 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

ShockRef

A clinical reference for managing shock and hemodynamics, offering insights into bedside physiology, resuscitation, and mechanical circulatory support. It includes practical calculators and drug references for critical care professionals and students.

Highlights
  • Shock phenotyping
  • Resuscitation workflows
  • Vasoactive drug references
  • Mechanical circulatory support troubleshooting
  • Physiology-based critical care
  • Practical calculators
Features
Read full description

ShockRef is a focused educational reference for clinicians and learners managing shock, hemodynamics, vasoactive therapy, and temporary mechanical circulatory support. It integrates bedside physiology, shock phenotyping, resuscitation workflows, monitoring pitfalls, drug references, MCS troubleshooting, source citations, and practical calculators for structured, physiology-based critical care. This app is intended for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you may have regarding a medical condition, and never disregard or delay seeking professional advice because of information provided by this app. About Rishi Kumar, MD, FACC ("RK.MD") I'm an adult cardiothoracic anesthesiologist and cardiovascular ICU intensivist practicing in academic medicine. I'm passionate about teaching with free, open-access medical education. Learn more on my site: https://rk.md

Screenshots

EBMcalc Pulmonary4 screens
ShockRef4 screens

Verdict

The call

The clearest difference is price: ShockRef at Free against EBMcalc Pulmonary's $4.99. ShockRef also leads on update cadence (every 4 days vs every 33 months) and rating (5.0 vs 4.7). EBMcalc Pulmonary's advantage is iOS requirement (10.0 vs 26.0). On ratings volume, 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

ShockRef is free to download; EBMcalc Pulmonary costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ShockRef holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 3 and 8 respectively.

UpkeepUpdate frequency

EBMcalc Pulmonary ships an update every 33 months, ShockRef every 4 days. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

Scorecard5 real differences · 5 level
EBMcalc Pulmonary versus ShockRef: the parameters behind the verdict, then further details
ParameterEBMcalc PulmonaryShockRef
Price$4.99Free — better
Rating4.7 (3 ratings)5.0 (8 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings38 — better
Update frequencyEvery 33 monthsEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS10.0 — better26.0
Further details — not scored
Size5 MB15 MB
Age rating17+17+
DeveloperFoundation Internet Services, LLCRishi Kumar

Customer experience

EBMcalc Pulmonary

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

ShockRef

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

EBMcalc Pulmonary

No in-app purchases

None

ShockRef

No in-app purchases

Questions

Is EBMcalc Pulmonary free?
EBMcalc Pulmonary costs $4.99, with no in-app purchases.
Is ShockRef free?
ShockRef is free to download, with no in-app purchases.
Which has better reviews, EBMcalc Pulmonary or ShockRef?
ShockRef is rated higher. EBMcalc Pulmonary averages 4.7 out of 5 from 3 ratings, while ShockRef averages 5.0 from 8 ratings.
Do EBMcalc Pulmonary or ShockRef have ads?
Neither EBMcalc Pulmonary nor ShockRef shows ads.
Which is updated more often, EBMcalc Pulmonary or ShockRef?
EBMcalc Pulmonary ships an update every 33 months, and ShockRef every 4 days. Most recently, EBMcalc Pulmonary was updated on November 6, 2026 and ShockRef on October 31, 2026.

Other comparisons