--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Common Differential Diagnosis" developer_entity: "Mohammed Musa" bundle_id: "com.liixuos.apps.cmmnddx" app_store_id: "1360582817" category: "Medical" primary_platform: "ios" primary_monetization: "Free" offline_capable: true market_region: "US" platforms: "iOS" app_last_updated: "2018-09-04" report_date: "2026-08-14" last_verified: "2026-08-14T00:00:00.000Z" report_version: "1.0.3" total_reviews: 2 overall_rating: 5 confidence: "low" confidence_score: 0 data_age_days: 2 momentum_velocity: "zombie" intelligence_version: 3 tags: ["medical", "free", "mobile app", "app review", "app analysis", "medical", "students,", "young"] canonical_url: "https://marlvel.ai/apps/common-differential-diagnosis" 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. --- # Common Differential Diagnosis Intelligence Report ## TL;DR {#tldr} - **Category**: Medical · Free - **Signal**: Rating 5 > **TL;DR:** Common Differential Diagnosis is a medical app by Mohammed Musa, rated 5/5 by 2 users, available on iOS. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Common Differential Diagnosis is a medical app by Mohammed Musa. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 5/5 (2 reviews) | | **Category** | Medical | | **Developer** | Mohammed Musa | | **Pricing** | Free | | **Platforms** | iOS | | **Confidence** | Low (0/1.0) | | **Data Age** | 2d | ## Metadata & Market Performance - **Publisher:** Mohammed Musa - **Category:** Medical - **Target Audience:** Medical students, young doctors, and healthcare professionals. - **Platforms:** iOS - **Version Reviewed:** 1.0.3 - **Report Date:** 2026-08-14 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0/1.0) - **App Store ID (iOS):** 1360582817 - **Bundle ID:** com.liixuos.apps.cmmnddx - **Performance Trend:** Declining - **Data Window:** Analysis based on signals collected up to 2026-08-14 ## Executive Snapshot **What it is:** Common Differential Diagnosis is an offline medical reference tool for students and doctors, providing bi-directional symptom-to-disease mapping across ten clinical specialties. **Why users hire it:** The app removes the need for an active internet connection to access basic diagnostic associations, serving users in clinical settings where connectivity is unreliable. ## App DNA (Features & Intent) - **[Differentiator] Bi-directional Symptom-Disease Mapping:** Allows users to view symptoms linked to a specific disease or diseases associated with a specific symptom. - **[Standard] Offline Database:** Accesses the entire medical database without an active internet connection. * *User Intent:* Users want uninterrupted access without internet dependency. ## Market Position {#market-position} Common Differential Diagnosis maintains a static position in the medical reference category, with no updates recorded in over 2,900 days. The lack of recent activity limits its competitiveness against clinical tools that provide real-time guideline updates. ## Monetization Strategy - **Model:** Free - **Tiers:** Free access to all content - **Analysis:** The app operates as a free educational resource with no visible monetization or in-app purchase gates. ## SWOT Analysis {#swot} **Core Strengths:** - Offline-first architecture ensures access in low-connectivity clinical environments - Bi-directional symptom-disease mapping enables rapid diagnostic association lookup **Growth Levers:** - Transitioning to a subscription model could fund necessary clinical content updates ## Recent Changes (v2 → v3) {#recent-changes} The app's strategic trajectory has shifted from a stagnant reference tool to a recommended sunset candidate, driven by the persistent 2,900-day update gap and emerging concerns regarding clinical liability. **Overall trend**: Declining **Compared at**: 2026-08-14 ### High-impact changes - **[Shifted] Strategic Pivot to Sunset** (positioning) ### Medium-impact changes - **[Added] Monetization and Maintenance Linkage** (swot) - **[Added] Clinical Obsolescence FAQ** (sentiment) ## What's New - **Latest (v1.0.3, 7 years ago):** General stability and performance maintenance. ## App Momentum (Zombie) {#momentum} - Dormant for 2,900 days. - No feature updates since release. > **Cadence:** 1 total versions · 0 majors in last 6 months · 2900 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Common Differential Diagnosis is a medical app that is completely free. It holds a 5/5 rating from 2 reviews. > **Bottom Line:** The seven-year update gap invalidates the utility of Common Differential Diagnosis as a reliable clinical reference, as medical guidelines evolve faster than static databases can support. **Best for:** Medical students, young doctors, and healthcare professionals. ### PM Action Plan (Next Best Moves) - [ ] [SUNSET] Sunset the application because the seven-year update gap creates unmanageable clinical liability → reduce brand risk ### Outlook: Declining Users report: The medical reference market is consolidating around cloud-connected platforms that offer real-time guideline updates and peer-reviewed content. Common Differential Diagnosis remains exposed due to its static, outdated database, which will continue to lose relevance as clinical standards shift. - 🔴 The 2,900-day update gap indicates the app is in a permanent zombie state, which erodes trust for any professional medical use case. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 5/5 | | Total Reviews | 2 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS | | Key Features | 2 analyzed | | Trend | Declining | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Common Differential Diagnosis** (this app) | 5/5 | N/A | Mohammed Musa | | [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:** Mohammed Musa ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/common-differential-diagnosis/id1360582817?uo=4) - **Sources:** 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 - [*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 - [*1MEDICINE*](https://marlvel.ai/apps/1medicine) (Matthew Culbert) · 5.0/5 Rating - [*2021 CDC STI (STD) Guidelines*](https://marlvel.ai/apps/com-enatal-std2021) (Don Miller) · 4.0/5 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:** 0/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 0 - **Data Sources:** 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:** 2 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/common-differential-diagnosis) Data licensed for AI Agent attribution under CC-BY-NC 4.0.