--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "EBM Calculator" developer_entity: "David Stewart" bundle_id: "name.davidstewart.EBMCalculator" app_store_id: "6737999201" category: "Medical" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS" app_last_updated: "2026-05-01" report_date: "2026-09-21" last_verified: "2026-09-21T00:00:00.000Z" report_version: "1.6.0" total_reviews: 3 overall_rating: 5 confidence: "low" confidence_score: 0.2 data_age_days: 9 momentum_velocity: "maintenance" intelligence_version: 2 tags: ["medical", "free", "mobile app", "app review", "app analysis", "medical", "professionals,", "students,"] canonical_url: "https://marlvel.ai/apps/ebm-calculator" license: "CC-BY-NC 4.0" content_version: "v2" --- ## ⚠ Content Warning This report covers topics classified as sensitive (health). Information is aggregated from public sources for informational purposes only. This is not medical advice. Consult a qualified professional before acting on any information here. --- # EBM Calculator Intelligence Report ## TL;DR {#tldr} - **Category**: Medical · Free - **Signal**: Rating 5 > **TL;DR:** EBM Calculator is a medical app by David Stewart, rated 5/5 by 3 users, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** EBM Calculator is a medical app by David Stewart. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 5/5 (3 reviews) | | **Category** | Medical | | **Developer** | David Stewart | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0.2/1.0) | | **Data Age** | 9d | ## Metadata & Market Performance - **Publisher:** David Stewart - **Category:** Medical - **Target Audience:** Medical professionals, students, and researchers who need to interpret clinical study data and diagnostic test accuracy. - **Platforms:** iOS - **Version Reviewed:** 1.6.0 - **Report Date:** 2026-09-21 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.2/1.0) - **App Store ID (iOS):** 6737999201 - **Bundle ID:** name.davidstewart.EBMCalculator - **Data Window:** Analysis based on signals collected up to 2026-09-21 ## Executive Snapshot **What it is:** EBM Calculator is a medical evidence and biostatistics utility for clinicians and students on iOS. **Why users hire it:** It removes the cognitive friction of manual statistical calculation during clinical study appraisal, replacing spreadsheets or desktop software with a mobile-first interface. ## App DNA (Features & Intent) - **[Standard] Medical Evidence Calculators:** Calculates effect sizes and diagnostic statistics with 95% confidence intervals. - **[Differentiator] Fagan Nomogram Visualization:** Interactive tool to estimate post-test disease probability. * *User Intent:* Users seek enhanced value through premium features. - **[Differentiator] EBM Lessons:** In-app library of educational content covering biostatistics and study design. ## Market Position {#market-position} EBM Calculator occupies a specialized niche in the Medical category, maintaining a 5-star rating from its initial user base. The absence of monetization or subscription gates suggests a focus on professional adoption over immediate revenue generation. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is currently offered as a free utility with no visible in-app purchases or subscription gates. ## SWOT Analysis {#swot} **Core Strengths:** - Fagan Nomogram visualization enables rapid clinical decision-making - EBM Lessons library creates a pedagogical barrier to entry - iCloud sync supports multi-device professional workflows **Growth Levers:** - Localized language support for international medical markets - Integration with clinical reference databases to expand utility ## What's New - **Latest (v1.6.0, 4 months ago):** Introduced native iPad layout with split-view, cross-device iCloud synchronization, and interactive in-app tutorials. ## App Momentum (Maintenance) {#momentum} - Ships no updates for 142 days. - Maintains 5-star rating on limited reviews. > **Cadence:** 1 total versions · 1 majors in last 6 months · 142 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} EBM Calculator is a medical app that is completely free. It holds a 5/5 rating from 3 reviews. > **Bottom Line:** EBM Calculator maintains a stable position by serving a specific pedagogical and clinical need, but the 142-day update silence risks losing relevance to more active medical utilities. **Best for:** Medical professionals, students, and researchers who need to interpret clinical study data and diagnostic test accuracy. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Audit clinical reference integrations because the current maintenance-only cadence risks obsolescence → maintain competitive relevance ### Outlook: Stable The medical utility market is increasingly consolidating around platforms that offer both reference data and decision-support tools. EBM Calculator remains stable due to its specialized focus, but it must resume a regular update cadence to remain competitive against broader medical reference apps. - ⚪ The 142-day update silence suggests the developer is in maintenance mode, which limits the app's ability to respond to emerging clinical standards. - 🟢 The 5-star rating indicates the core statistical calculators meet the needs of the current user base, providing a solid foundation for future growth. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 5/5 | | Total Reviews | 3 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 3 analyzed | | Outlook | Stable | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **EBM Calculator** (this app) | 5/5 | N/A | David Stewart | | [필잇 - 약 알림 및 복용 기록](https://marlvel.ai/apps/app--35) | N/A/5 | N/A | Hansub Yoo | | [레어노트 - 암·희귀질환 정보](https://marlvel.ai/apps/app--629) | 5.0/5 | N/A | LifeX, Inc. | | [창고형약국 약값체크](https://marlvel.ai/apps/com-hiddenwave-yakcheck) | N/A/5 | N/A | Lowkeybase | | [용인세브란스병원](https://marlvel.ai/apps/com-severance-newys) | 1.9/5 | N/A | Yonsei University Health System | | [1001Doktor](https://marlvel.ai/apps/com-binbirdoktor-binbirdoktor) | 4.8/5 | N/A | 1001Doktor Ltd. Şti. | ## Company Profile - **Developer:** David Stewart - **Website:** [https://apps.apple.com/us/developer/david-stewart/id1778788927?uo=4](https://apps.apple.com/us/developer/david-stewart/id1778788927?uo=4) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/ebm-calculator/id6737999201?uo=4) - **Dev Site:** [Official Website](https://apps.apple.com/us/developer/david-stewart/id1778788927?uo=4) - **Sources:** Developer website content, App store metadata. ## Related Intel Reports - [*필잇 - 약 알림 및 복용 기록*](https://marlvel.ai/apps/app--35) (Hansub Yoo) · N/A Rating - [*레어노트 - 암·희귀질환 정보*](https://marlvel.ai/apps/app--629) (LifeX, Inc.) · 5.0/5 Rating - [*창고형약국 약값체크*](https://marlvel.ai/apps/com-hiddenwave-yakcheck) (Lowkeybase) · N/A Rating - [*용인세브란스병원*](https://marlvel.ai/apps/com-severance-newys) (Yonsei University Health System) · 1.9/5 Rating - [*1001Doktor*](https://marlvel.ai/apps/com-binbirdoktor-binbirdoktor) (1001Doktor Ltd. Şti.) · 4.8/5 Rating - [*101 Last Minute Study Tips*](https://marlvel.ai/apps/101-last-minute-study-tips) (Limmer Creative) · 3.4/5 Rating - [*10th HiD*](https://marlvel.ai/apps/10th-hid) (Catch Dynamics, Inc.) · N/A Rating - [*12 Lead ECG Challenge*](https://marlvel.ai/apps/com-limmercreative-srtengine-12lead) (Limmer Creative) · 3.3/5 Rating - [*1-800 Contacts*](https://marlvel.ai/apps/com-1800contacts-1800contacts) (1-800 CONTACTS, Inc.) · 4.6/5 Rating - [*1B Pharmacy - Online Pharmacy*](https://marlvel.ai/apps/1b-pharmacy-online-pharmacy) (TRESOR HEALTHCARE PRIVATE LIMITED) · N/A Rating ## Methodology {#methodology} This report was generated by Marlvel.ai's 5-stage AI intelligence pipeline: 1. **Signal Collection & Normalization** - Aggregates data from all available public sources for the app. Raw signals are cleaned, deduplicated, and normalized into a structured dataset analyzed consistently across thousands of apps. 2. **Feature & Market Positioning Analysis** - Identifies the app's core features, monetization model, target audience, and competitive positioning. Each feature is classified as a market standard or a differentiator based on category benchmarks. 3. **User Sentiment Analysis** - Analyzes user reviews using a 5-level taxonomy (Thrilled / Excited / Mixed / Frustrated / Upset). Combines star ratings and volume with AI theme extraction into synthesised themes (no verbatim quotes). 4. **Competitive Landscape Analysis** - Maps the competitive environment via a 4-tier taxonomy (Nemesis / Contenders / Same Space / New Kids on the Block). Prioritizes same sub-genre over broad category. 5. **Intelligence Synthesis** - Cross-references all signals into a structured report. Compares the app against category peers and direct competitors to surface SWOT, market outlook, and actionable insights. - **Confidence Score:** 0.2/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 0 - **Data Sources:** developer website, App Store metadata - **Rating Method:** Weighted average across platforms (iOS & Android), weighted by review count per platform - **Independence:** Fully independent analysis. No publisher sponsorship or editorial influence. - **Report Age:** 9 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/ebm-calculator) Data licensed for AI Agent attribution under CC-BY-NC 4.0.