Comparison

CathSource vs HEART

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

HEART

Explore the human heart with this comprehensive 3D digital anatomy atlas. It offers detailed interactive images, animations, and clinical perspectives to enhance understanding of cardiac structures and functions. Ideal for learning and teaching cardiovascular anatomy.

Highlights
  • 3D animated anatomy
  • Interactive labeled images
  • Clinical perspectives
  • Detailed anatomical descriptions
  • Zoom-in/out functionality
  • Audio narration
Features
Read full description

The Focus Digital Atlas on Heart is a tool to enhance knowledge and comprehension on – - Location of heart in Thorax - Pericardium - Heart - External surfaces - Heart - Chambers - Valves of the heart - Coronary circulation - Venous drainage - Conducting system of the heart The Focus Digital Atlas on Heart - The most comprehensive Atlas with an exhaustive array of plates! - A 3D animated, reference tool to recognize and comprehend anatomical positions, planes, dissection layers, and understand clinical manifestations of various medical conditions. - Includes 3D animation videos of important applied aspects with clinical perspectives! - Includes Interactive images with detailed description for each label, enabled with user-paced on/off feature and zoom-in /out options Extensive information accessible through valuable visual tools using 3D animations accompanied by audio and interactive images. - Excellent Learning tool - Ideal for Knowledge retention - Reinforces knowledge through unlimited viewing -Enhances the learning and teaching experience

Screenshots

CathSource4 screens
HEART4 screens

Verdict

The call

The clearest difference is rating: HEART at 3.7 against CathSource's 1.6. HEART also leads on iOS requirement (9.0 vs 18.5). CathSource's advantage is in-app purchases (none vs 8) and update cadence (every 2 months vs every 21 months). On price, ads 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. HEART sells 8 one-off in-app purchases. CathSource asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

HEART holds the better App Store score, 3.7 against 1.6. That said, the two scores are not equally well evidenced: CathSource has 23 ratings behind it against 3, so its average is the more settled of the two.

UpkeepUpdate frequency

CathSource ships an update every 2 months, HEART every 21 months. The most recent releases landed on October 12, 2026 and October 15, 2026 respectively.

Scorecard6 real differences · 4 level
CathSource versus HEART: the parameters behind the verdict, then further details
ParameterCathSourceHEART
PriceFreeFree
Rating1.6 (23 ratings)3.7 (3 ratings) — better
Positive reviews38.5% of reviews—
Number of ratings23 — better3
Update frequencyEvery 2 months — betterEvery 21 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.59.0 — better
Further details — not scored
Size79 MB55 MB
Age rating12+4+
DeveloperECGsource LLCFocus Medica

Customer experience

CathSource

All ratings23 ratings
Positive8.7%
Neutral8.7%
Negative82.6%
Written reviews39 reviews
Positive38.5%
Neutral7.7%
Negative53.8%

HEART

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

CathSource

No in-app purchases

8 purchases

HEART

One-time8
  • Pericardium - Digital Atlas$2.99
  • Heart External surface - Digital Atlas$2.99
  • Heart Chambers-Digital Atlas$2.99
Show 5 more
  • Valves of the heart - Digital Atlas$2.99
  • Coronary circulation - Digital Atlas$2.99
  • Venous drainage - Digital Atlas$2.99
  • Conducting System of the Heart - Digital Atlas$2.99
  • Digital Atlas - Buy All$12.99

Questions

Is CathSource free?
CathSource is free to download, with no in-app purchases.
Is HEART free?
HEART is free to download, with in-app purchases available.
Which has better reviews, CathSource or HEART?
HEART is rated higher. CathSource averages 1.6 out of 5 from 23 ratings, while HEART averages 3.7 from 3 ratings.
Do CathSource or HEART have ads?
Neither CathSource nor HEART shows ads.
Which is updated more often, CathSource or HEART?
CathSource ships an update every 2 months, and HEART every 21 months. Most recently, CathSource was updated on October 12, 2026 and HEART on October 15, 2026.

Other comparisons