Comparison

ECHO On vs ShockRef

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

Head to head
About

ECHO On

This medical education app helps users learn Transesophageal Echocardiography with a question bank, cognitive aid, case log, and reference library. It provides guidance on performing and interpreting a standard 28-view exam, including anatomy, function, and Doppler interrogations.

Highlights
  • Transesophageal Echocardiography education
  • Enlarging question bank
  • Rescue TEE cognitive aid
  • Case Log system
  • Perioperative Quick Reference library
  • Offline echo loops
  • Pathology, technique, and normal loop examples
Features
Read full description

ECHO On is a free medical education resource for learning Transesophageal Echocardiography including a free, enlarging question bank, a Rescue TEE cognitive aid, a Case Log system for submission to the NBE, and a growing perioperative Quick Reference library with offline echo loops that work even in the OR without internet access, and includes pathology examples, techniques, and normal loops of the heart. ECHO On will walk you through an entire standard 28 view exam teaching you the anatomy, function and Doppler interrogations you should perform at each view, and how to interpret them. ECHO On is and will remain free, and the best way you can contribute is to submit boards-style questions or echo stills and echo loops to help grow the QBank, Quick Reference and Pathology libraries. Disclaimer: This app was written to provide an accessible perioperative tool for residents and fellows learning TEE in the cardiac OR and ICU, and for generalist anesthesiologists looking to refresh their knowledge of TEE. It is not meant for patients to self-diagnose. It is not meant to be a definitive reference. Despite my best efforts, there may be errors or inaccuracies in this app, so please do not use it for medical decision making, as doing so may lead you misdiagnose or seriously harm your patient. If you are not a qualified medical doctor, please see a qualified medical doctor before making any medical decisions, including those based on echocardiograms.

About

ShockRef

A clinical reference for managing shock and hemodynamics, offering insights into bedside physiology, resuscitation, and mechanical circulatory support. It includes practical calculators and drug references for critical care professionals and students.

Highlights
  • Shock phenotyping
  • Resuscitation workflows
  • Vasoactive drug references
  • Mechanical circulatory support troubleshooting
  • Physiology-based critical care
  • Practical calculators
Features
Read full description

ShockRef is a focused educational reference for clinicians and learners managing shock, hemodynamics, vasoactive therapy, and temporary mechanical circulatory support. It integrates bedside physiology, shock phenotyping, resuscitation workflows, monitoring pitfalls, drug references, MCS troubleshooting, source citations, and practical calculators for structured, physiology-based critical care. This app is intended for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you may have regarding a medical condition, and never disregard or delay seeking professional advice because of information provided by this app. About Rishi Kumar, MD, FACC ("RK.MD") I'm an adult cardiothoracic anesthesiologist and cardiovascular ICU intensivist practicing in academic medicine. I'm passionate about teaching with free, open-access medical education. Learn more on my site: https://rk.md

Screenshots

ECHO On4 screens
ShockRef4 screens

Verdict

The call

The clearest difference is ratings volume: ECHO On at 14 against ShockRef's 3. ECHO On also leads on iOS requirement (15.6 vs 26.0). On price, rating, update cadence and ads 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 ECHO On against 5.0 for ShockRef. Both are backed by a comparable volume of ratings — 14 and 3 respectively.

UpkeepUpdate frequency

ECHO On ships an update weekly, ShockRef every 4 days. The most recent releases landed on October 13, 2026 and October 10, 2026 respectively.

Scorecard2 real differences · 8 level
ECHO On versus ShockRef: the parameters behind the verdict, then further details
ParameterECHO OnShockRef
PriceFreeFree
Rating4.9 (14 ratings)5.0 (3 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings14 — better3
Update frequencyWeeklyEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better26.0
Further details — not scored
Size414 MB15 MB
Age rating12+17+
DeveloperRobert ArrigoRishi Kumar

Customer experience

ECHO On

All ratings14 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

ShockRef

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

ECHO On

No in-app purchases

None

ShockRef

No in-app purchases

Questions

Is ECHO On free?
ECHO On is free to download, with no in-app purchases.
Is ShockRef free?
ShockRef is free to download, with no in-app purchases.
Which has better reviews, ECHO On or ShockRef?
ShockRef is rated higher. ECHO On averages 4.9 out of 5 from 14 ratings, while ShockRef averages 5.0 from 3 ratings.
Do ECHO On or ShockRef have ads?
Neither ECHO On nor ShockRef shows ads.
Which is updated more often, ECHO On or ShockRef?
ECHO On ships an update weekly, and ShockRef every 4 days. Most recently, ECHO On was updated on October 13, 2026 and ShockRef on October 10, 2026.

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