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35
BU Score
Emerging

ECGsource

3.0 ✍️ Editor
✍️ bumetric analysis

ECGsource is an iOS app from ECGsource LLC in the Education category, currently rated 3.0★ across 8 ratings. Initial signal reads as mixed reviews: supporters praise core features while critics cite stability and value gaps.

Our BU Score puts it at 35: Emerging (early traction worth watching). For a Education app, that means early traction worth watching.

Track changes month-over-month in the Performance section below: live snapshot history and revenue forecast included.

📊 Performance Tracking LIVE

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Reviews
Forecast Revenue / mo
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💰 Forecast Revenue / mo

MODEL
Revenue forecast computed from BU's 234 trigger model on each snapshot. Calibrated against ground-truth from 58 verified-revenue apps.
🔬Forecast Breakdown — Why This Estimate?Top 5 of 5 triggers
Our ML model uses 200+ signals from public data. These are the most influential for this app:
Paid app ($0.00)METRIC
+$2,800
Below-average rating (3.0★)METRIC
−$1,500
Mature app (15y old)METRIC
+$1,500
Single-language (English only)METRIC
−$400
Pre-traction phase (8 ratings)METRIC
−$300
METRIC = structural app data · REVIEW = mined from user reviews · ✓ VERIFIED = Stripe-verified anchor (TrustMRR)

📈 Reviews Growth

LIVE
Cumulative review count from first BU snapshot. Each point = a tracked update.

⭐ Rating Trend

LIVE
Average rating evolution. Updates with each new review batch.

🗓️ Snapshot Timeline

HISTORY
Each bar shows a tracked update and the metric delta from the previous snapshot.
App Specs
🔐 Own this app? Claim & verify MRR →
💾 349 MB🔞 12+📱 iOS 9.0+🔖 v3.4🔄 updated 8y ago🌐 EN📂 Education💰 Paid🚀 Launched 2010 (15y old)

📝 About this app

**Excellent resource for ECG Criteria and Board Review!**

ECGsource (from the developers of the CathSource and EchoSource Apps) is a supplemental application to ECGsource.com, the largest online educational resource for electrocardiograms. ECGsource has been developed for medical education and board review, and assists institutions in documenting trainee competency in electrocardiogram (ECG) interpretation.

ECGsource for the iPhone/iPad provides the following resources:
-> Full-List of Searchable ECG Diagnoses and Criteria
-> Over 65 High-Resolution Sample ECG Images
-> ECG Quiz (5-question demo of website's full content)
-> ECG Video Tutorials for Beginners (over 50 minutes of tutorial videos)

**ECG Criteria is an easily searchable rapid reference for more than 90 of the most common ECG diagnoses, including: Normal ECG, Incorrect Electrode Placement, Artifact, Atrial Enlargement, Sinus Rhythm, Sinus Arrhythmia, Bradycardia, Tachycardia, Sinus Arrest, Sinoatrial Exit Block, Atrial Premature Complexes, Atrial Tachycardia, Multifocal Atrial Tachycardia, Supraventricular Tachycardia, Atrial Flutter, Atrial Fibrillation, AV Junctional Rhythm/Tachycardia, Ventricular Premature Complexes, Ventricular Tachycardia, Accelerated Idioventricular Rhythm, Ventricular Fibrillation, AV Block, (1st Degree, 2nd Degree, and 3rd Degree), Wolff-Parkinson-White, AV Dissociation, Low Voltage, Axis Deviation, Electrical Alternans, Ventricular Hypertrophy, Complete and Incomplete Right Bundle Branch Block, Left Anterior Fascicular Block, Left Posterior Fascicular Block, Complete and Incomplete Left Bundle Branch Block, Non-specific Intraventricular Conduction Disturbance, Functional (Rate-Related) Aberrancy, Anterolateral Infarction (Age Recent or Probably Acute), Anterolateral Infarction (Age Indeterminate or Probably Old), Anterior or Anteroseptal Infarction (Age Recent or Probably Acute), Anterior or Anteroseptal Infarction (Age Indeterminate or Probably Old), Lateral Infarction (Age Recent or Probably Acute), Lateral Infarction (Age Indeterminate or Probably Old), Inferior Infarction (Age Recent or Probably Acute), Inferior Infarction (Age Indeterminate or Probably Old), Posterior Infarction (Age Recent or Probably Acute), Posterior Infarction (Age Indeterminate or Probably Old), Early Repolarization, Juvenile T Waves, Nonspecific ST and/or T Wave Abnormalities, ST and/or T Wave Abnormalities Suggesting Myocardial Ischemia, ST and/or T Wave Abnormalities Suggesting Myocardial Injury, ST and/or T Wave Abnormalities Suggesting Electrolyte Disturbances, ST and/or T wave Abnormalities Secondary to Hypertrophy, Prolonged Q-T Interval, Prominent U Waves, Digitalis Effect, Hyperkalemia, Hypokalemia, Hypercalcemia, Hypocalcemia, Secundum Atrial Septal Defect, Primum Atrial Septal Defect, Dextrocardia, Chronic Lung Disease, Acute Cor Pulmonale Including Pulmonary Embolism, Pericardial Effusion, Acute Pericarditis, Hypertrophic Cardiomyopathy, Central Nervous System Disorder, Myxedema, Hypothermia, Sick Sinus Syndrome, Brugada Syndrome, Ebstein's Anomaly, Atrial or Coronary Sinus Pacing, Ventricular Demand Pacemaker (VVI), Dual Chamber Pacemaker (DDD), and Pacemaker Malfunction.**

**ECG Video Tutorial section includes over 50 minutes of video tutorials designed to assist beginners learning electrocardiogram interpretation. Tutorial topics include Understanding the Cardiac Conduction System, Understanding the Limb and Precordial Leads, Determining ECG Rate and Axis, Left Ventricular Hypertrophy, Bundle Branch Blocks, and ST-Segment Elevation.**

Visit us online at ECGsource.com for more information.

🆕 What's New · v3.4

This update from Apple will improve the functionality of this app. No new features are included.

- iOS 9 compatibility
- Implemented Autolayout to address screen size and rotation issues throughout the app
- Fixed a bug where video files would not play audio
- Card table view style
- Conversion to latest Swift

Profile & Insights

Everything we know — and don't — about this app and its company.

Identification

App name
ECGsource
Developer
ECGsource LLC
Bundle ID
com.ecgsource.applicationname
App Store URL
Open in App Store
Category
Education
Content rating
12+
Languages
EN

Company

Website
ecgsource.com
Tagline
Not found
Description
Not found
Founded
Not found
HQ / Address
Not found
Employees
Not found
Logo
Not found

Revenue

Verified revenue / mo
Not found
AI revenue estimate / mo
Not found
AI annual estimate
Not found
ML model estimate / mo
$144/mo
Top-grossing rank
Outside top 100 in US Education
All-time revenue
Not found
Pricing
Not found

Founder

Name
Not found
X / Twitter
Not found
LinkedIn
Not found
GitHub
Not found
X followers
Not found
Public statements
Not found

Funding

Total raised
Not found
Last round
Not found
Investors
Not found
Crunchbase
Not found
AngelList
Not found

Press & Links

Articles found
Not found
Listed on
Not found
Blog
Not found
Press / News
Not found

Contacts & Socials

Socials
Not found
Email
Not found
Phone
Not found
Contact page
http://ecgsource.com/contact.php
About page
http://ecgsource.com/about.php
Recent App Store Reviews13 latest · avg 4.08★ · 61.5% 5★ · 7.7% 1★
5★
8 (62%)
4★
2 (15%)
3★
0 (0%)
2★
2 (15%)
1★
1 (8%)
+0 ratings/week
Praise: great ×4 best ×3 awesome ×1 favorite ×1 recommend ×1Complaints: subscription ×1
Top positive
★★★★★ The best source available online
Without question, the most useful study guide available online. Up to date and easy to navigate.…
★★★★★ a must have
More thorough than any other ECG app currently on the market. Will refresh your memory of any important clinical conditions that could show up on an ECG.…
Top negative
★☆☆☆☆ Don’t download
The bank of ECGs from the website IS NOT AVAILABLE on the app. All the app has are examples of each ECG criterion. You can’t actually work any ECGs. I should have known something was fishy when I have already payed for a subscription to the…
★★☆☆☆ So-so
I am an experienced paramedic and ALS instructor. I picked up this program hoping to expand my library of ekg strips for when i teach as some are difficult to come by even on a generator. However i find the ecg notes are pretty good. Ut t…
📈Ratings growth8 ratings+700% lifetimeShow 3-year history estimate ▾Jun 2010May 2024May 2026
Tracked (15 weeks) Pre-tracking estimate (37 weeks) · model-based, ±5% noise · anchored to release date and current value
🌍Geographic ReachNot ranked
This app is currently outside the top 100 grossing in all 9 countries we monitor (US, UK, DE, FR, JP, CA, AU, BR, IN). Niche or new apps often launch this way — popularity rankings appear once daily revenue clears the regional threshold.
Profile is built from iTunes Lookup + developer site scrape + ML revenue model. Empty fields show "Not found" — additional sources (Crunchbase, X, IndieHackers, Acquire.com) coming.

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Full revenue analysis
Read the article-style breakdown for ECGsource: category rank, percentile, growth signal, comparable apps, and how the forecast is calibrated against verified-MRR anchors in this niche.
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