Comparison

The Chief Complaint vs Nerve Block

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

The Chief Complaint

This emergency medicine guide offers an algorithmic approach to over 50 common complaints. It provides decision support, links to medical resources, and includes a drug guide and calculators. A clinical community forum is also available for collaboration.

Highlights
  • Algorithmic approach to common ER complaints
  • Clinical decision support algorithms
  • Links to medical resources (PubMed, EM:RAP, etc.)
  • Emergency medicine drug guide
  • Medical calculators and scores
  • ESCAVO Clinical Community forum
Features
Read full description

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

About

Nerve Block

This app simplifies pain management by providing a quick reference for anesthesia and analgesia nerve blocks. Users select the body area, find eligible blocks, and follow step-by-step visual guides for precise procedures.

Highlights
  • Select body area for anesthesia
  • List of eligible nerve blocks
  • Simplified reference for each block
  • Step-by-step guides
  • Includes images for guidance
  • Aggregated content from medical resources
Features
Read full description

Getting your patient’s pain under control shouldn’t be so hard! With Nerve Block, all you need to do is select the area that you need anesthesia or analgesia and you’ll get a list of eligible nerve blocks. For each nerve block, we’ve created a simplified reference with exactly what you’ll need, where to go, and images to guide you along the way. 1. Select the part 2. Find the block 3. Follow the guide Nerve Block is a #FOAM project aggregating content from The POCUS Atlas, Denver Ultrasound, WikEM and Highland Ultrasound

Screenshots

The Chief Complaint4 screens
Nerve Block4 screens

Verdict

The call

The clearest difference is ratings volume: The Chief Complaint at 653 against Nerve Block's 31. The Chief Complaint also leads on review sentiment (88% vs 78%) and device support (3 vs 1). Nerve Block's advantage is update cadence (every 4 months vs every 9 months). On price, rating, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.8 for The Chief Complaint against 4.9 for Nerve Block. That said, the two scores are not equally well evidenced: The Chief Complaint has 653 ratings behind it against 31, so its average is the more settled of the two. Written reviews are what separate them: 88% of The Chief Complaint's written reviews are positive against 78% of Nerve Block's.

UpkeepUpdate frequency

The Chief Complaint ships an update every 9 months, Nerve Block every 4 months. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
The Chief Complaint versus Nerve Block: the parameters behind the verdict, then further details
ParameterThe Chief ComplaintNerve Block
PriceFreeFree
Rating4.8 (653 ratings)4.9 (31 ratings) — better
Positive reviews88.0% of reviews — better77.8% of reviews
Number of ratings653 — better31
Update frequencyEvery 9 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS11.0 — better16.4
Further details — not scored
Size157 MB48 MB
Age rating17+17+
DeveloperEscavo, IncTom Fadial

Customer experience

The Chief Complaint

All ratings653 ratings
Positive96.2%
Neutral1.7%
Negative2.1%
Written reviews25 reviews
Positive88.0%
Neutral4.0%
Negative8.0%

Nerve Block

All ratings31 ratings
Positive96.8%
Neutral3.2%
Negative0.0%
Written reviews9 reviews
Positive77.8%
Neutral22.2%
Negative0.0%

Bugs and requests

The Chief Complaint

Reported bugs

1 issue
  • App crashes when deleting bookmarks

Requested features

3 requests
  • iPad landscape orientation support
  • Additional drug information in complaint categories
  • Expanded content for OB/GYN and toxicology sections

Nerve Block

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

The Chief Complaint

No in-app purchases

None

Nerve Block

No in-app purchases

Questions

Is The Chief Complaint free?
The Chief Complaint is free to download, with no in-app purchases.
Is Nerve Block free?
Nerve Block is free to download, with no in-app purchases.
Which has better reviews, The Chief Complaint or Nerve Block?
Nerve Block is rated higher. The Chief Complaint averages 4.8 out of 5 from 653 ratings, while Nerve Block averages 4.9 from 31 ratings.
Do The Chief Complaint or Nerve Block have ads?
Neither The Chief Complaint nor Nerve Block shows ads.
Which is updated more often, The Chief Complaint or Nerve Block?
The Chief Complaint ships an update every 9 months, and Nerve Block every 4 months. Most recently, The Chief Complaint was updated on November 1, 2026 and Nerve Block on October 24, 2026.

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