# EBM Calculator

> Interpret study results fast

Canonical page: [https://chrome-stats.com/d/id6737999201](https://chrome-stats.com/d/id6737999201)

## Overview

- **ID:** `id6737999201`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** David Stewart
- **Category:** Medical
- **Rating:** 5.00 / 5 (3 ratings)
- **Version:** 1.6.0
- **Last updated:** 2026-05-01
- **First published:** 2025-04-23
- **Size:** 14 MB
- **Data as of:** 2026-09-04
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/ebm-calculator/id6737999201)
- **Website:** [https://www.ebmcalculator.com](https://www.ebmcalculator.com/)
- **Privacy policy:** [https://www.ebmcalculator.com/privacy-policy](https://www.ebmcalculator.com/privacy-policy)

## Description

Built to support your appraisal of medical evidence—EBM Calculator is fast, clear, and easy to use.

Effect Size Calculator
•  Used for studies that examine the effect of a therapy or exposure
•  Calculate key measures for dichotomous outcomes:
    ◦  Absolute Risk Reduction (ARR)
    ◦  Number Needed to Treat (NNT)
    ◦  Risk Ratio (RR)
    ◦  Relative Risk Reduction (RRR)
    ◦  Odds Ratio (OR)
•  Includes 95% Confidence Intervals for every metric

Diagnostic Test Calculator
•  Used for studies that evaluate the accuracy of a diagnostic test
•  Calculate core statistics:
    ◦  Sensitivity & Specificity
    ◦  Likelihood Ratios (LR+, LR–)
    ◦  Positive & Negative Predictive Values (PPV, NPV)
•  Includes 95% Confidence Intervals for all measures

Post-Test Probability Calculator
•  Used to estimate the likelihood of disease after a test result
•  Input Sensitivity & Specificity or Likelihood Ratios
•  Visualize probability changes with an interactive Fagan Nomogram

Save, Search & Share
•  Save unlimited results for future reference
•  Search, sort, and filter results to quickly find what matters
•  Share results as a PNG—ideal for Messages, email, and clean formatting
•  Export results as an .ebmc file to archive or send to other EBM Calculator users
•  Tap an .ebmc file to import results back into EBM Calculator

Lessons
•  Explore lessons in Evidence-Based Medicine (EBM)
•  Reinforce core concepts in biostatistics and study design
 • Search lessons by title or keyword

Guided Tutorials
   • Step-by-step tutorials walk you through every major feature
   • Access from the menu in each view or from Settings

iCloud Sync
   • Saved results sync automatically across all your devices

Have questions, feedback, or suggestions?
Reach out to support@ebmcalculator.com

## Rankings

- #557,262 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6737999201)