Comparison

EchoRef vs EVD educational toolkit

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

Head to head
About

EchoRef

This educational reference app provides comprehensive information on point-of-care ultrasound (POCUS), echocardiography, and cardiac measurements. It includes lessons on interventional procedures and hemodynamic calculations for medical professionals.

Highlights
  • Point-of-care ultrasound (POCUS)
  • Transthoracic echocardiography (TTE)
  • Transesophageal echocardiography (TEE)
  • Cardiac dimensions and valve measurements
  • Hemodynamic and ultrasound calculations
  • Interventional procedure lessons
Features
Read full description

Echocardiography and point-of-care ultrasound organized for the bedside. EchoRef is a comprehensive echocardiography and ultrasound reference for physicians, nurses, advanced practice clinicians, sonographers, medical students, and other healthcare learners. Review TEE, TTE, and POCUS videos, check cardiac measurements and diagnostic criteria, evaluate native and prosthetic valves, and perform commonly used ultrasound and hemodynamic calculations, all in one focused reference. FEATURES • Educational video library covering 2D and 3D TEE, interventional echocardiography, mechanical circulatory support, and clinical cases • POCUS instruction for cardiac, lung, abdominal, vascular, and peripheral nerve block examinations • Cardiac anatomy measurements and reference values for chamber size, ventricular function, diastology, and vascular structures • Native valve assessment for aortic, mitral, tricuspid, and pulmonic stenosis and regurgitation • Prosthetic valve reference for surgical valves, TAVR, and prosthesis evaluation • Ultrasound and hemodynamic calculators for valve area, cardiac output, ventricular function, filling pressures, vascular resistance, shunts, fluid responsiveness, and more • Cardiac equations, hemodynamic reference values, and ultrasound physics • Clinical protocols, focused examination guidance, findings atlas, and reporting documentation • Acquisition guidance, measurement tips, common pitfalls, and related clinical content • Global search, favorites, related links, and personal notes EchoRef connects ultrasound physics, image acquisition, echocardiographic interpretation, and bedside decision-making. Whether you are learning standard views, reviewing an unfamiliar finding, evaluating valve disease, or checking a calculation, the app makes relevant information easy to find. Created by Rishi Kumar, MD, FACC (“RK.MD”), an academic adult cardiothoracic anesthesiologist and cardiovascular ICU intensivist committed to free, open-access medical education. Learn more at https://rk.md EchoRef is intended for educational and informational purposes only. It does not provide medical advice and is not a substitute for professional judgment, diagnosis, or treatment. Clinical findings and calculations must be independently verified and interpreted in the context of the individual patient. Seek guidance from a qualified healthcare professional regarding any medical condition. Do not disregard or delay professional medical advice because of information provided by this app.

About

EVD educational toolkit

This medical reference app provides comprehensive information on external ventricular drains (EVDs) and intracranial pressure (ICP) monitoring. It's designed for neuro-ICU and neuroanesthesia teams, nurses, and trainees, offering insights into setup, waveforms, imaging, and best practices.

Highlights
  • EVD definition, indications, and epidemiology
  • EVD setup and drainage settings
  • ICP waveform analysis
  • CT imaging examples
  • Transport and MRI safety checklists
  • Best practices and clinical pearls
  • EVD device photo library
Features
Read full description

EVD educational toolkit is a clinician-facing reference on external ventricular drains (EVDs) and intracranial pressure (ICP) monitoring, designed for neuro-ICU and neuroanesthesia teams, nurses, and trainees. WHAT'S INSIDE • What is an EVD? Definition, common indications, and epidemiology • EVD Setup: leveling at the external auditory meatus, transducer safety, and drainage settings used in practice • ICP Waveforms: normal and abnormal P1/P2/P3 morphology with real bedside tracings • CT Imaging: expected catheter position and imaging examples • Transport & MRI Safety: a pre-transport checklist and MRI safety steps • Best Practices: do's and don'ts and CSF color interpretation • Clinical Pearls: concise, referenced teaching points • Types of EVD and EVD Systems: a photo library of devices and drainage systems • QI Metrics and EHR Alerts: suggested quality metrics, reportable events, and an example institutional EHR workflow • Educational videos, downloadable resources, and materials from the SNACC EVD Safety Campaign REFERENCED CONTENT Clinical content in the app is linked to published sources, including the SNACC perioperative guidelines for external ventricular and lumbar drains and the Neurocritical Care Society EVD consensus statement, with direct links to PubMed. Where content reflects one institution's practice rather than published evidence, the app says so. EDUCATIONAL USE ONLY This app is an educational resource. It is not a medical device, does not diagnose or recommend treatment for individual patients, and does not replace clinical judgment, institutional protocols, or manufacturer instructions. The app has no accounts and does not collect patient information. RESEARCH STUDY This app is part of a research study evaluating clinical implementation of the EVD Toolkit. The University of Washington Human Subjects Division reviewed the study and determined it exempt from further IRB review (STUDY00026573, approved 9/16/2026). Participation in the optional feedback survey is voluntary. Developed at the University of Washington.

Screenshots

EchoRef4 screens
EVD educational toolkit4 screens

Verdict

The call

The clearest difference is ratings volume: EchoRef at 1.4K against EVD educational toolkit's 5. EVD educational toolkit's advantage is iOS requirement (18.5 vs 26.0). 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 — 4.9 for EchoRef against 5.0 for EVD educational toolkit. That said, the two scores are not equally well evidenced: EchoRef has 1.4K ratings behind it against 5, so its average is the more settled of the two.

Scorecard2 real differences · 8 level
EchoRef versus EVD educational toolkit: the parameters behind the verdict, then further details
ParameterEchoRefEVD educational toolkit
PriceFreeFree
Rating4.9 (1.4K ratings)5.0 (5 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings1.4K — better5
Update frequencyEvery 2 months—
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad — betteriPhone
Requires iOS26.018.5 — better
Further details — not scored
Size104 MB21 MB
Age rating17+17+
DeveloperRishi KumarUniversity Of Washington

Customer experience

EchoRef

All ratings1,387 ratings
Positive97.2%
Neutral1.4%
Negative1.4%
Written reviews12 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

EVD educational toolkit

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

EchoRef

No in-app purchases

None

EVD educational toolkit

No in-app purchases

Questions

Is EchoRef free?
EchoRef is free to download, with no in-app purchases.
Is EVD educational toolkit free?
EVD educational toolkit is free to download, with no in-app purchases.
Which has better reviews, EchoRef or EVD educational toolkit?
EVD educational toolkit is rated higher. EchoRef averages 4.9 out of 5 from 1.4K ratings, while EVD educational toolkit averages 5.0 from 5 ratings.
Do EchoRef or EVD educational toolkit have ads?
Neither EchoRef nor EVD educational toolkit shows ads.

Other comparisons