Health-related content. Aggregated from public sources for informational purposes only. This is not medical advice. Consult a qualified professional before making decisions. .

Harriet Lane Handbook

Harriet Lane Handbook

By Unbound Medicine

Harriet Lane Handbook is a pediatric clinical reference app for residents and practitioners, providing drug formularies and research tools on iOS and Android.

The App DNA

What makes this app unique?

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.

For Pediatric residents, interns, and healthcare practitioners requiring authoritative, mobile-accessible clinical guidelines.

What does it look like?

Key features

Pediatric Drug Formularystandard

Database of medication dosing, interactions, and side effects specific to pediatric care.

Prime PubMed Searchedge

Integrated search for journal articles with abstract access and Grapherence visual relationship mapping.

Integrated Clinical Calculatorsstandard

Built-in tools for dosage, IV, and conversion calculations.

How much does it cost?

subscriptionFree preview of select topicsAnnual subscription for Davis’s Drug Guide at $39.99/year

Subscription model anchored at $39.99/year for supplemental drug databases, utilizing a freemium preview to drive initial acquisition.

Velocity

Intense developmentShow more...

5 versions in history. Development pace: intense.

See all version history

Who built it?

Unbound Medicine

13+ apps tracked · Medical

DSM-5-TR® Diagnosis HandbookDSM-5-TR® Diagnosis HandbookDavis's Drug Guide - NursesDavis's Drug Guide - Nurses5-Minute Emergency Medicine5-Minute Emergency MedicineJohns Hopkins Antibiotic GuideJohns Hopkins Antibiotic GuideNursing CentralNursing CentralOxford Handbook Clinical MedOxford Handbook Clinical MedOxford General PracticeOxford General PracticeOxford Emergency MedicineOxford Emergency MedicineOxford Handbook of AnesthesiaOxford Handbook of AnesthesiaOxford General PracticeOxford General PracticeOxford Foundation ProgramOxford Foundation ProgramOxford Emergency MedicineOxford Emergency Medicine
Explore the full publisher profile

User Sentiment

What do users think recently?

Fresh user feedback skews mixed. Users appreciate medical professionals rely on the comprehensive drug dosage reference for daily clinical decision support.

How are ratings & reviews evolving?

App Store
4.76 · 581
Google Play
4.71 · 184

What users say, by theme

What Users Love
  • Medical professionals rely on the comprehensive drug dosage reference for daily clinical decision support
What Frustrates Users
  • Users report the app fails to launch or access content after major operating system updates
+ 2 more themes
What Users Want 1 request inside

16 of 16 recent reviews analyzed · moderate confidence · Mixed overall

Read the full review analysis

Unlock 2 more frustration themes and 1 user request, each backed by review evidence.

Access the full report for free

Competition

Competitive landscape for Harriet Lane Handbook

How's the Medical market?

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.

Read the market outlook

The rivals identified

MDCalc Medical Calculator

By MD Aware, LLC

Both apps target the same clinical audience of residents and practitioners, competing for daily bedside utility during patient care.

  • MDCalc provides 900+ clinical calculators, while Harriet Lane Handbook lacks a dedicated pediatric dosage calculator.
  • MDCalc includes CME tracking features, which are absent from the Harriet Lane Handbook feature set.
  • MDCalc offers offline-first architecture, ensuring tool access in hospital environments with poor connectivity.
Harriet Lane Handbook vs MDCalc Medical Calculator

Unlock the head-to-head verdict: where this rival wins, and where it loses.

Access the full report for free

The Analyst's Read

Key takeaways for Harriet Lane Handbook

Where is it heading?

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.

The SWOT

Core Strengths
  • Clinical authority established by Johns Hopkins School of Medicine content
  • High-utility research tools like Prime PubMed increase daily usage frequency
Critical Frictions 2 weaknesses inside
Growth Levers
  • Expanding the pediatric dosage calculator functionality to restore a previously removed, high-demand utility
Market Threats 1 threat identified

Next best moves

1 Invest · 1 Pivot

Audit and fix launch stability after OS updates because user complaints cite access failure as the top churn risk → improve retention.

+ 1 more prioritized move

The counter-intuitive read

The app's high rating masks a fragile retention loop…

Read the full take

Since the last report: The app shifted to a paid subscription model while simultaneously experiencing a decline in stability and the removal of a core dosage calculator feature.

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.

Unlock 2 critical frictions, 1 market threat, 1 more prioritized move and the analyst’s take.

Access the full report for free

Sources

  1. [1] App Store, source

Report last updated

Disclosure: Independent intel to help mobile builders succeed.

AI-powered analysis with automated quality gates, built from publicly available sources. Marlvel.ai is not affiliated with, endorsed by, or sponsored by Harriet Lane Handbook, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

What's new

The app shifted to a paid subscription model while simultaneously experiencing a decline in stability and the removal of a core dosage calculator feature.

shifted

Introduction of Subscription Model

removed

Removal of Dosage Calculator

declined

Emergence of Stability Complaints

improved

Prime PubMed Search Upgrade

Cite this report

Marlvel.ai. “Harriet Lane Handbook Intelligence Report.” Updated Aug 7, 2026. https://marlvel.ai/apps/harriet-lane-handbook

Agent Markdown (.md)See methodologyContact support

Data licensed under CC-BY-NC 4.0