Comparison

CathSource vs IVUSAID

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

Head to head
About

CathSource

A comprehensive medical reference focused on cardiac catheterization and angiography. It offers a searchable index of specialized topics, a database of videos of common and rare findings, and a collection of images including hemodynamic formulas and tables.

Highlights
  • Searchable index of cardiac catheterization topics
  • Database of coronary angiogram, ventriculogram, and aortogram videos
  • Image database with hemodynamic formulas and tables
  • Covers common and rare cardiovascular pathologies
  • Developed by practicing Interventional Cardiologists
Features
Read full description

CathSource (from the creators of ECGsource) is an up-to-date medical reference devoted exclusively to cardiac catheterization and angiography. Developed by practicing Interventional Cardiologists for both specialists and trainees in the field of cardiovascular disease, CathSource offers the following content: * Searchable index of specialized topics including: Normal Coronary Anatomy Anomalous Coronary Arteries Coronary Artery Aneurysms Myocardial Bridging Takotsubo Cardiomyopathy Plaque Rupture & Thrombus Standard Views of Angiography Left Ventriculography Coarctation of the Aorta Femoral Artery Access for Angiography Radial Artery Access for Angiography Intravascular Ultrasound (IVUS) Optical Coherence Tomography (OCT) Fractional Flow Reserve (FFR) Hemodynamics: Intracardiac Pressures Hemodynamics: Intracardiac Waveforms Hemodynamics: Cardiac Output Hemodynamics: Intracardiac Shunts Hemodynamics: Aortic Stenosis Hemodynamcis: Aortic Regurgitation Hemodynamics: Mitral Stenosis Hemodynamcis: Mitral Regurgitation Hemodynamcis: Constriction Hemodynamics: Restriction * Searchable database containing more than 30 videos (coronary angiograms, ventriculograms, and aortograms) of both common and rare findings in the cardiac catheterization lab * Searchable database of over 65 images including hemodynamic formulas, tables, and figures CathSource provides a detailed overview of important cardiac catheterization and angiography topics, incorporating educational images/videos as well as reviews of pertinent medical literature. CathSource is the ideal application to assist you in understanding and recognizing cardiovascular pathology in the catheterization lab.

About

IVUSAID

This free educational app teaches medical professionals how to use intravascular ultrasound (IVUS) for PCI guidance. It features interactive lessons, image interpretation tools, and complex case studies to overcome barriers to IVUS adoption.

Highlights
  • IVUS principles and image acquisition
  • Image interpretation with videos and descriptions
  • Complex coronary case studies
  • Interactive quiz section with explanations
  • PCI guidance for stent sizing and optimization
Features
Read full description

The IVUSAID App is a free educational mobile application which has been developed to teach medical professionals how to use intravascular ultrasound (IVUS) for PCI guidance based on the current guidelines using our extensive experience and large database of complex coronary cases. Despite the growing body of evidence for clinical benefits of IVUS-guided PCI, IVUS remains underutilized in much of the world including the United States. Challenges in image interpretation and education are among the barriers to widespread adoption of IVUS in everyday clinical practice. Mount Sinai Heart is a global leader within the field of interventional cardiology as well as mobile apps development. The myriad of cases and pathology which are seen in The Mount Sinai Cardiac Catheterization Laboratory make it the perfect center to educate medical professionals within this field. The Key Concepts section of IVUSAID describes principles of IVUS, image acquisition, and concepts of ultrasound behavior in various tissues. The Image Interpretation section of the app has dozens of representative cross-sectional images, videos, and descriptions of plaque types, stent apposition and expansion, artifacts, and more. A short video for each type of lesion or artifact and post-stent findings, in addition to an annotated representative cross section aims to overcome a major limitation of any article or book on IVUS which present a static image, since the actual IVUS pullback is dynamic. Twenty-one complex coronary cases demonstrate IVUS guidance in a variety of patient presentations and lesions including ACS, LM bifurcation, severely calcified lesions and calcified nodules, spontaneous coronary artery dissection, and malapposed stents as well as how IVUS was used to inform treatment decisions. An extensive quiz section helps deliver educational content in a more interactive format where answers are accompanied by detailed explanations and references. We hope that IVUSAID will help techs, fellows, and early-career physicians incorporate IVUS in their daily practice for stent sizing, post-stent optimization, and identification of appropriate treatment strategies.

Screenshots

CathSource4 screens
IVUSAID4 screens

Verdict

The call

The clearest difference is rating: IVUSAID at 5.0 against CathSource's 1.6. IVUSAID also leads on monetization model (ad-supported vs paid) and iOS requirement (15.0 vs 18.5). CathSource's advantage is ads (none vs shown) and update cadence (every 2 months vs every 18 months). On price, in-app purchases and device support 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

IVUSAID holds the better App Store score, 5.0 against 1.6. That said, the two scores are not equally well evidenced: CathSource has 23 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

CathSource ships an update every 2 months, IVUSAID every 18 months. The most recent releases landed on September 18, 2026 and June 4, 2026 respectively.

Scorecard6 real differences · 4 level
CathSource versus IVUSAID: the parameters behind the verdict, then further details
ParameterCathSourceIVUSAID
PriceFreeFree
Rating1.6 (23 ratings)5.0 (1 ratings) — better
Positive reviews42.9% of reviews—
Number of ratings23 — better1
Update frequencyEvery 2 months — betterEvery 18 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationPaidAd-supported — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.515.0 — better
Further details — not scored
Size79 MB80 MB
Age rating12+17+
DeveloperECGsource LLCCardiology Apps LLC

Customer experience

CathSource

All ratings23 ratings
Positive8.7%
Neutral8.7%
Negative82.6%
Written reviews35 reviews
Positive42.9%
Neutral8.6%
Negative48.6%

IVUSAID

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

CathSource

No in-app purchases

None

IVUSAID

No in-app purchases

Questions

Is CathSource free?
CathSource is free to download, with no in-app purchases.
Is IVUSAID free?
IVUSAID is free to download, with no in-app purchases.
Which has better reviews, CathSource or IVUSAID?
IVUSAID is rated higher. CathSource averages 1.6 out of 5 from 23 ratings, while IVUSAID averages 5.0 from 1 ratings.
Do CathSource or IVUSAID have ads?
IVUSAID shows ads; CathSource does not.
Which is updated more often, CathSource or IVUSAID?
CathSource ships an update every 2 months, and IVUSAID every 18 months. Most recently, CathSource was updated on September 18, 2026 and IVUSAID on June 4, 2026.

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