--- schema_type: "SoftwareApplication" entity_type: "Mobile Application" app_name: "Harriet Lane Handbook" developer_entity: "Unbound Medicine, Inc." bundle_id: "com.unboundmedicine.HarrietLaneHandbookForMobileAndWeb" app_store_id: "458365685" google_play_id: "com.unbound.android.cqhlil" category: "Medical" primary_platform: "ios" primary_monetization: "Subscription" offline_capable: false market_region: "US" platforms: "iOS & Android" app_last_updated: "2026-04-02" report_date: "2026-08-07" last_verified: "2026-08-07T00:00:00.000Z" report_version: "1.22" total_reviews: 765 overall_rating: 4.7 sentiment: "Mixed" sentiment_score: 45 confidence: "medium" confidence_score: 0.5 top_praise_theme: "Medical professionals rely on the comprehensive drug dosage reference for daily clinical decision support" top_complaint_theme: "Users report the app fails to launch or access content after major operating system updates" review_sample_size: 16 total_review_count: 16 analyzed_review_count: 16 data_age_days: 61 momentum_velocity: "intense" intelligence_version: 3 tags: ["medical", "subscription", "mixed sentiment", "mobile app", "app review", "app analysis", "pediatric", "residents,", "interns,"] canonical_url: "https://marlvel.ai/apps/harriet-lane-handbook" 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. --- # Harriet Lane Handbook Intelligence Report ## TL;DR {#tldr} - **Category**: Medical · Subscription - **Signal**: Rating 4.75 · Sentiment Mixed - **Recent focus**: Users report the app fails to launch or access content after major operating system updates (top complaint) · Medical professionals rely on the comprehensive drug dosage reference for daily clinical decision support (top praise) > **TL;DR:** Harriet Lane Handbook is a medical app by Unbound Medicine, Inc., rated 4.75/5 by 765 users, with Mixed user sentiment (45/100), available on iOS & Android. > > **Marlvel.ai App Intelligence** - Independent analysis. US Market. No publisher influence. > **Key Insight:** Harriet Lane Handbook shows Mixed sentiment (4.75/5 from 765 reviews) - users praise medical professionals rely on the comprehensive drug dosage reference for daily clinical decision support but report issues with users report the app fails to launch or access content after major operating system updates. ## Quick Facts | Fact | Value | | :--- | :--- | | **Rating** | 4.75/5 (765 reviews) | | **User Mood** | Mixed | | **Category** | Medical | | **Developer** | Unbound Medicine, Inc. | | **Pricing** | Subscription | | **Platforms** | iOS & Android | | **Confidence** | Medium (0.5/1.0) | | **Data Age** | 61d | ## Metadata & Market Performance - **Publisher:** Unbound Medicine, Inc. - **Category:** Medical - **Target Audience:** Pediatric residents, interns, and healthcare practitioners requiring authoritative, mobile-accessible clinical guidelines. - **Platforms:** iOS & Android - **Version Reviewed:** 1.22 - **Report Date:** 2026-08-07 - **Signal Count:** 16 reviews analyzed - **Confidence:** Medium (0.5/1.0) - **App Store ID (iOS):** 458365685 - **Bundle ID:** com.unboundmedicine.HarrietLaneHandbookForMobileAndWeb - **Google Play ID:** com.unbound.android.cqhlil - **Performance Trend:** Declining - **Data Window:** Analysis based on signals collected up to 2026-08-07 ## Executive Snapshot **What it is:** Harriet Lane Handbook is a pediatric clinical reference app for residents and practitioners, providing drug formularies and research tools on iOS and Android. **Why users hire it:** Medical professionals hire the app for rapid, evidence-based clinical decision support during high-pressure shifts, where access reliability is the primary job-to-be-done. ## App DNA (Features & Intent) - **[Standard] Pediatric Drug Formulary:** Database of medication dosing, interactions, and side effects specific to pediatric care. - **[Differentiator] Prime PubMed Search:** Integrated search for journal articles with abstract access and Grapherence visual relationship mapping. * *User Intent:* Users want to quickly find relevant content or features. - **[Standard] Integrated Clinical Calculators:** Built-in tools for dosage, IV, and conversion calculations. ## Market Position {#market-position} Harriet Lane Handbook holds a #76 rank in the Medical category (US). The gap between its authoritative content and the recurring access complaints signals a high risk of churn among professional users. ## Monetization Strategy - **Model:** Subscription - **Tiers:** Free preview of select topics, Annual subscription for Davis’s Drug Guide at $39.99/year - **Analysis:** Subscription model anchored at $39.99/year for supplemental drug databases, utilizing a freemium preview to drive initial acquisition. ## 🟡 User Sentiment (Medium Confidence: 16 of 16 reviews analyzed) {#user-sentiment} - **Overall Rating:** 4.75/5 - **Platform Split:** iOS 4.8/5 (581 ratings) | Android 4.7/5 (184 ratings) - **Overall Sentiment:** Mixed ### Top Praises - **Medical professionals rely on the comprehensive drug dosage reference for daily clinical decision support** ### Top Complaints (Impact Areas) - **Users report the app fails to launch or access content after major operating system updates** ## SWOT Analysis {#swot} **Core Strengths:** - Clinical authority established by Johns Hopkins School of Medicine content - High-utility research tools like Prime PubMed increase daily usage frequency **Growth Levers:** - Expanding the pediatric dosage calculator functionality to restore a previously removed, high-demand utility ## Recent Changes (v2 → v3) {#recent-changes} The app shifted to a paid subscription model while simultaneously experiencing a decline in stability and the removal of a core dosage calculator feature. **Overall trend**: Declining **Compared at**: 2026-08-07 ### High-impact changes - **[Shifted] Introduction of Subscription Model** (pricing) - **[Removed] Removal of Dosage Calculator** (features) - **[Declined] Emergence of Stability Complaints** (sentiment) ### Medium-impact changes - **[Improved] Prime PubMed Search Upgrade** (features) ## App Momentum (Intense) {#momentum} - Ships periodic content updates. - Last major release 127 days ago. > **Cadence:** 5 total versions · 0 majors in last 6 months · 13 days since last update ## The "So What?" (Strategic Takeaway) {#so-what} Harriet Lane Handbook is a medical app. With a 4.75/5 rating from 765 reviews, it shows mixed user reception. > **Bottom Line:** Harriet Lane Handbook maintains a strong clinical reputation, but recurring access failures after system updates threaten its long-term retention, so the team must prioritize stability and restore core utilities to justify the annual subscription price. **Best for:** Pediatric residents, interns, and healthcare practitioners requiring authoritative, mobile-accessible clinical guidelines. ### PM Action Plan (Next Best Moves) - [ ] [INVEST] Audit and fix launch stability after OS updates because user complaints cite access failure as the top churn risk → improve retention. ### Outlook: Mixed The market for clinical reference tools remains stable, but the app's reliance on legacy architecture leaves it exposed to churn. Addressing stability is the only way to protect the subscription revenue stream from users who feel forced into repurchases. - 🔴 Recurring access failures after system updates erode the daily active habit, which compounds the rating drag already visible on Android. ## Key Metrics Summary | Metric | Value | | :--- | :--- | | Overall Rating | 4.75/5 | | Total Reviews | 765 | | Sentiment | Mixed (45/100) | | Confidence | Medium | | Pricing Model | Subscription | | Platforms | iOS & Android | | Key Features | 3 analyzed | | Trend | Declining | | Outlook | Mixed | ## Competitor Comparison | App | Rating | Sentiment | Developer | | :--- | :--- | :--- | :--- | | **Harriet Lane Handbook** (this app) | 4.75/5 | Mixed | Unbound Medicine, Inc. | | [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:** Unbound Medicine, Inc. - **Website:** [https://www.unboundmedicine.com/harrietlane](https://www.unboundmedicine.com/harrietlane) - **Social:** [Instagram](https://www.instagram.com/unboundmedicine) · [Facebook](https://www.facebook.com/unboundmedicineinc) · [YouTube](https://www.youtube.com/unboundmedicine) · [LinkedIn](https://www.linkedin.com/company/unbound-medicine) ## Data Sources & Links - **App Store:** [View on Apple Store](https://apps.apple.com/us/app/harriet-lane-handbook/id458365685?uo=4) - **Google Play:** [View on Google Play](https://play.google.com/store/apps/details?id=com.unbound.android.cqhlil&hl=en&gl=us) - **Dev Site:** [Official Website](https://www.unboundmedicine.com/harrietlane) - **Sources:** Developer website content, App store metadata, User reviews. ## 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 - [*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 - [*2nd.MD*](https://marlvel.ai/apps/2nd-md) (Accolade, Inc.) · 4.9/5 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:** 0.5/1.0 (based on review volume, data source diversity, and signal quality) - **Reviews Analyzed:** 16 - **Data Sources:** user reviews, 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:** 61 days since last refresh --- © 2026 Marlvel.ai | [Canonical Report](https://marlvel.ai/apps/harriet-lane-handbook) Data licensed for AI Agent attribution under CC-BY-NC 4.0.