Research answer
What AppTrendKit can say about The Chief Complaint today
The Chief Complaint 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 intelligence
Observed trajectory and estimates
Store ranks are observations. Downloads and gross store consumer spend are AppTrendKit estimates and only appear when persisted evidence exists.
Estimated downloads · 30D
ModeledNo persisted estimate
The page does not turn missing evidence into zero.
Estimated App Store gross consumer spend · 30D
ModeledNo persisted estimate
The page does not turn missing evidence into zero.
Estimated downloads · 7D
ModeledNo persisted estimate
The page does not turn missing evidence into zero.
Estimated App Store gross consumer spend · 7D
ModeledNo persisted estimate
The page does not turn missing evidence into zero.
Evidence history
Collected daily performance
No daily metric history has been persisted yet.
Rank history
Observed chart positions
Lower rank is better. Only collected observations are shown.
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
Country estimates are aggregated only after country-level predictions exist.
Monetization
Observed store economics signals
These are listing and product observations. They are not company revenue, subscriber counts, or advertising revenue.
App details
Store metadata
- Version
- 4.0
- Released
- Jun 13, 2015
- Last updated
- Oct 13, 2023
- Content rating
- 17+
- Default storefront
- EG
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 Chief Complaint app now includes access the new ESCAVO Clinical Community, a forum where clinicians can exchange ideas, ask questions and collaborate on sepsis and other clinical topics. How would you like to walk into the ER confident that you knew what to do, no matter what comes through the door? The Chief Complaint app uses an algorithmic approach to over 50 of the most common complaints encountered in emergency medicine. Never feel lost or overwhelmed again, not knowing what the next step in the work-up is. Not sure what tests to order or if the patient can go home? The Chief Complaint helps you answer all those questions and more! - Algorithm based approach to the most common emergency medicine complaints - Based on the #1 bestselling emergency medicine clinical guide "The Chief Complaint" - Used by the residents of LA County + USC emergency medicine program, one of the top emergency medicine programs in the world - Color coded by organ system for easy navigation - Exhaustively referenced to the most important studies and articles in emergency medicine (over 400 citations!) with direct links to PubMed abstracts for easy access to original sources - Over 60 high resolution clinical management and decision support algorithms - Direct subject-specific links to EM:RAP, Essentials of Emergency Medicine and theNNT.com for further resources and deeper dives on all subjects - Journal club feature allows you to dive deeper into the evidence basis of your decisions - Peer reviewed by leading physicians in emergency medicine - Important medical calculators and scores commonly used in the ER - Emergency medicine drug guide easily accessible right from the content pages - All content, including treatment algorithms, is built-in, network access is only required for content updates - Automatic content updating keeps app's contents constantly up to date free of charge The Chief Complaint is an invaluable resource for doctors, residents, medical students, nurses and other healthcare professionals working in emergency medicine and other acute care settings. Please send your feedback, questions or bug reports to info@escavo.com, we'd love to hear from you! Reviews: "The Chief Complaint is simply indispensable, carry it with me every shift. Excellent algorithms, concise, practical, clinically relevant explanations citing the current best-evidence for management decisions; without doubt Chief Complaint it is THE pocket Emergency Medicine reference to have with you at the bedside." -Manuel Montano, MD, PGY-3, LAC+USC EM Residency "...is really top notch. I really like how it organizes complaints in a flow pattern type way. This has allowed me to quickly adjust my decision making and makes it actually useful when I feel super pressured at work. The further detail located later has been helpful to one, get some good initial learning in and two, look to the resources cited for more in depth discussion." -David Benaron, UCSD Resident "Chief complaint is AWESOME...I think every single intern in the country should have one of these...SO COOL!" -James Grieme, UCSD Resident "The aptly named Chief Complaint is simply excellent. I really like the way it is laid out by cc and it's concise enough to be useful on a regular basis. I take it with me to every shift and would highly recommend it to anyone looking for a streamlined, functional, real-time guide for working up patients in the ED" -Nick Aldridge, UCSD Resident "... really something totally new in the medical education world. This app does something many have tried to do but few have achieved, which is to create an orienteering guide to the med-ed landscape while launching your thought processes AT THE BEDSIDE when confronted with a new undifferentiated and undiagnosed patient." -William "Billy" Mallon MD, Foreword
Publisher websiteStore creative
Screenshots
Competitive set
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Methodology and provenance
Read every number with its evidence
Metadata source: Apple iTunes Search API; observed Sep 7, 2026, 8:07 PM.
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: No persisted model version.
Confidence: —; intervals widen when evidence or history is limited.
Last observation: Sep 7, 2026, 8:07 PM.
See how AppTrendKit separates observations, estimates, coverage, and confidence.
Open methodology








