Harrison’s Internal Med. 21/E
Research answer
What AppTrendKit can say about Harrison’s Internal Med. 21/E today
Harrison’s Internal Med. 21/E has no estimate-backed download or gross-consumer-spend figure that meets the public evidence contract yet.
Observed App Store metadata, chart positions, and history are shown below. Missing, non-finite, undefined-currency, or undefined-metric evidence stays missing rather than becoming zero.
Performance
Downloads, revenue and chart history
Estimates for the last 7D. Chart positions come from the App Store; downloads and revenue are AppTrendKit estimates, shown as a size band (for example 10K–50K) with a confidence level.
Estimated downloads · 30D
Upper limitUnder 500
Below the top 100 in Medical (GB)
The app is not in its category's top 100, so it has less than the app ranked #100 there. We show this limit until we have enough data for an estimate.
Estimated App Store gross consumer spend · 7D
UnavailableNo estimate yet
We only show an estimate once we have enough data. Missing numbers are never shown as zero.
History
Collected daily performance
No daily history yet.
Rank history
Chart positions
Lower rank is better. Only collected observations are shown.
- Free
- —
- Paid
- —
- Grossing
- #80
| Date | Free | Paid | Grossing |
|---|---|---|---|
| Sep 27, 2026 | — | — | #80 |
Coverage note
What the ranks mean
A missing rank is not treated as zero downloads or zero revenue. Apple chart feeds are bounded and may return censored or not-ranked observations outside the visible chart depth.
Read the methodStorefront mix
Top countries by estimated contribution · 7D
Country figures cover the days we collected in each country, so they don't add up to the worldwide estimate. Each country shows when it was last updated.
Monetization
How the app makes money
These are listing and product observations. They are not company revenue, subscriber counts, or advertising revenue.
App details
Store metadata
- Version
- 1.2
- Released
- Jul 28, 2022
- Last updated
- Apr 6, 2024
- Content rating
- 17+
- Default storefront
- GB
Public IAP observations
Validated in-app purchase prices
Only persisted rows with an explicit public publication boundary are shown. Missing price, currency, country, or date values stay unknown.
Listing detail
What the store says
The Voice of Clinical Reason Harrison’s Principles of Internal Medicine is the world's most trusted clinical medicine text―and a superb resource for learning the art and science of clinical reasoning. Recognized by healthcare professionals worldwide as the leading authority on applied pathophysiology and clinical medicine, Harrison’s Principles of Internal Medicine provides the informational foundation you need for the best patient care possible. This new edition is fully updated with timely new chapters and essential updates across the spectrum of internal medicine. Written and edited by the world’s top experts in their respective fields, this landmark guide provides comprehensive, accurate, and essential coverage of the pathogenesis, diagnosis, and treatment of disease. Harrison’s is world-renowned as the most authoritative source for: • Clear, concise schemas that facilitate the generation of differential diagnoses to reason efficiently through complex real world clinical cases • The physiologic and etiologic basis of signs and symptoms, which are covered through a wealth of unsurpassed expert guidance and linked to the disease-specific chapters that follow • Updated clinical trial results and recommended guidelines • Excellent and extensive visual support, including radiographs, clinical photos, schematics, and high-quality drawings • Coverage of both therapeutic approaches and specific treatment regimens • Practical clinical decision trees and algorithms • Organ/system-specific sections, with clinically relevant pathophysiology and practical clinical advice on the approach to the patient, strategies towards building a differential diagnosis, outstanding clinical algorithms and diagnostic schema, a wealth of clinical images and diagrams, current clinical guidelines, and general and specific approaches to therapy Harrison’s remains the most trusted resource in a world influenced by endless sources of medical information. The most timely and comprehensive updates from the world’s top experts are featured in the 21st edition: • Current coverage of the diagnosis and treatment of diseases, from COVID to dementia to sepsis to multiple sclerosis to lung cancer • Updated content that reflects new approved therapeutics and new practice-changing guidelines and evidence summaries • More than 1000 clinical, pathological, and radiographic photographs, diagnostic and therapeutic decision trees, and clear schematics and diagrams describing pathophysiologic processes • Numerous atlases featuring curated collections of important visual aspects of diagnosis and management • Updated and time-saving curation and synthesis of established and new medical literature and studies • Clinically relevant coverage of disease mechanics and pathophysiology, and related therapeutic mechanisms This app is easy to navigate, allowing you to browse the contents or search for keywords and phrases. The search tool will find text, images, tables and videos with one single fast search. The search tool shows you suggested words as you type so it is quick and helps with spelling issues. You can also creating bookmarks, notes, highlights, and change the text size for easier reading. Developed by Usatine Media
Store creative
Screenshots
Competitive set
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Deterministic links to real stored apps matched by category, publisher, and comparable performance bands.
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How we estimate
Where every number comes from
App details: Apple iTunes Search API, updated Sep 28, 2026, 12:29 AM.
Rankings: collected chart positions from the listed storefront. Missing ranks are not zeros.
Economics: downloads and gross store consumer spend are estimated, not official Apple or publisher figures.
Model: Lineage not exposed by this aggregate.
Confidence: —; intervals widen when evidence or history is limited.
Last updated: Sep 28, 2026, 12:29 AM.
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