--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "DRU Classification" developer_entity: "Department of Orthopaedics and Traumatology, The University of Hong Kong" bundle_id: "hk.hku.ortho.DRUApp" app_store_id: "1208011316" google_play_id: "com.druapp" category: "Medical" primary_platform: "ios" primary_monetization: "Free" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2022-01-05" report_date: "2026-10-28" last_verified: "2026-10-28T00:00:00.000Z" report_version: "2.0" total_reviews: 0 confidence: "low" confidence_score: 0.3 data_age_days: 17 momentum_velocity: "zombie" intelligence_version: 2 tags: ["medical", "free", "mobile app", "app review", "app analysis", "orthopaedic", "surgeons,", "medical"] canonical_url: "https://marlvel.ai/apps/dru-classification" 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. --- # DRU Classification Intelligence Report ## TL;DR {#tldr} - **Category**: Medical · Free > **TL;DR:** DRU Classification is a medical app by Department of Orthopaedics and Traumatology, The University of Hong Kong, available on iOS & Android. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** DRU Classification is a medical app by Department of Orthopaedics and Traumatology, The University of Hong Kong. ## Quick Facts | Fact | Value | | :--- | :--- | | **Category** | Medical | | **Developer** | Department of Orthopaedics and Traumatology, The University of Hong Kong | | **Pricing** | Free | | **Platforms** | iOS & Android | | **Confidence** | Low (0.3/1.0) | | **Data Age** | 17d | ## Metadata & Market Performance - **Publisher:** Department of Orthopaedics and Traumatology, The University of Hong Kong - **Category:** Medical - **Target Audience:** Orthopaedic surgeons, medical students, and clinical practitioners specializing in paediatric skeletal growth and scoliosis management. - **Platforms:** iOS & Android - **Version Reviewed:** 2.0 - **Report Date:** 2026-10-28 - **Signal Count:** 0 reviews analyzed - **Confidence:** Low (0.3/1.0) - **App Store ID (iOS):** 1208011316 - **Bundle ID:** hk.hku.ortho.DRUApp - **Google Play ID:** com.druapp - **Data Window:** Analysis based on signals collected up to 2026-10-28 ## Executive Snapshot **What it is:** DRU Classification is a medical reference tool for orthopaedic surgeons, providing skeletal maturity grading and height prediction calculators on iOS and Android. **Why users hire it:** The app removes the need for manual reference to academic publications during clinical consultations, providing immediate access to maturity assessment parameters. ## App DNA (Features & Intent) - **[Standard] DRU Classification Explanation:** Educational guide detailing the distal radius and ulna classification parameters for skeletal maturity assessment. * *User Intent:* Users need clear guidance to understand and adopt the product quickly. - **[Differentiator] DRU Grading Quiz:** Interactive assessment tool for testing knowledge of skeletal maturity grading. - **[Differentiator] Final Height Prediction Calculator:** Computational tool for estimating final body height in female patients with idiopathic scoliosis. ## Market Position {#market-position} DRU Classification occupies a niche academic space as a free, university-backed clinical reference tool. The lack of updates for over 1,750 days suggests it serves as a static knowledge repository rather than a competitive commercial product. ## Monetization Strategy - **Model:** Free - **Tiers:** Free - **Analysis:** The app is provided as a free academic and clinical tool with no monetization or in-app purchases. ## SWOT Analysis {#swot} **Core Strengths:** - Academic backing from The University of Hong Kong establishes high clinical trust **Growth Levers:** - Automated image grading could transform the app into an active diagnostic workflow tool ## What's New - **Latest (v3.0.1, 4 years ago):** Introduced a Height Prediction feature alongside a complete application rewrite. ## App Momentum (Zombie) {#momentum} The app has been silent for 1757 days, with the last release occurring in January 2022. > **Cadence:** 2 total versions · 2 majors in last 6 months · 1757 days since last update · 0 days avg between updates ## The "So What?" (Strategic Takeaway) {#so-what} DRU Classification is a medical app that is completely free. > **Bottom Line:** DRU Classification serves as a static academic reference, but the lack of updates for over four years leaves it vulnerable to platform obsolescence. Prioritizing a technical audit would preserve its utility as a niche clinical resource. **Best for:** Orthopaedic surgeons, medical students, and clinical practitioners specializing in paediatric skeletal growth and scoliosis management. ### PM Action Plan (Next Best Moves) - [ ] [MAINTAIN] Audit OS compatibility because the app has not been updated since 2022 → prevent store removal ### Outlook: Declining The market for specialized medical reference tools is shifting toward integrated, cloud-connected clinical platforms. DRU Classification remains a static, offline-only tool, which limits its long-term relevance as practitioners increasingly demand real-time data integration. - 🔴 The 1,758-day update gap indicates the app is in permanent maintenance mode, limiting its ability to incorporate new clinical research findings. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Total Reviews | 0 | | Confidence | Low | | Pricing Model | Free | | Platforms | iOS & Android | | Key Features | 3 analyzed | | Outlook | Declining | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **DRU Classification** (this app) | N/A/5 | N/A | Department of Orthopaedics and Traumatology, The University of Hong Kong | | [BabyMeasure: Growth Tracker](https://marlvel.ai/apps/babymeasure-growth-tracker) | N/A/5 | N/A | Emre HAMURCU | | [Lace Pro](https://marlvel.ai/apps/lace-pro) | 4.6/5 | Excited | Neurotone AI | | [Medical Abbreviations: Quick](https://marlvel.ai/apps/medical-abbreviations-quick) | 4.0/5 | Excited | VLR Software | | [Nursing Home Check](https://marlvel.ai/apps/nursing-home-check) | 4.0/5 | N/A | Alona Nesterenko | | [VetCore: Pet Health Records](https://marlvel.ai/apps/vetcore-pet-health-records) | N/A/5 | N/A | Dmitriy Motorin | ## Company Profile - **Developer:** Department of Orthopaedics and Traumatology, The University of Hong Kong - **Website:** [https://www.ortho.hku.hk](https://www.ortho.hku.hk) - **Social:** [Instagram](https://www.instagram.com/hkuortho) · [Facebook](https://www.facebook.com/HKUOrtho) · [X/Twitter](https://twitter.com/HKUOrtho) · [YouTube](https://www.youtube.com/channel/UC8hPpXcp6q0oURUNyvd8LxQ) ## Data Sources & Links - **App Store ID:** 1208011316 - **Google Play ID:** com.druapp - **Dev Site:** [Official Website](https://www.ortho.hku.hk) - **Sources:** Developer website content, About us / company information, App store metadata. ## Related Intel Reports - [*BabyMeasure: Growth Tracker*](https://marlvel.ai/apps/babymeasure-growth-tracker) (Emre HAMURCU) · N/A Rating - [*Lace Pro*](https://marlvel.ai/apps/lace-pro) (Neurotone AI) · 4.6/5 Rating | Positive Sentiment - [*Medical Abbreviations: Quick*](https://marlvel.ai/apps/medical-abbreviations-quick) (VLR Software) · 4.0/5 Rating | Positive Sentiment - [*Nursing Home Check*](https://marlvel.ai/apps/nursing-home-check) (Alona Nesterenko) · 4.0/5 Rating - [*VetCore: Pet Health Records*](https://marlvel.ai/apps/vetcore-pet-health-records) (Dmitriy Motorin) · N/A Rating - [*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 ## 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:** 0.3/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 0 - **Data Sources:** developer website, company about page, 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:** 17 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/dru-classification) Data licensed for AI Agent attribution under CC-BY-NC 4.0.