CathSource vs Heart Chart
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
Heart Chart
This app allows medical professionals to visually document cardiac surgery cases. Users can draw graft configurations, add procedures, and generate PDF summaries for review or sharing. It's designed for surgeons, trainees, and educators to illustrate operative concepts.
- Draw CABG graft configurations
- Add associated procedures
- Generate professional PDF case summaries
- Save cases with subscription
- Simple step-by-step workflow
- Designed for clinical education
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HeartChart is a visual tool for illustrating cardiac surgery cases on iPhone and iPad. Draw CABG graft configurations on a heart diagram, add associated procedures, and generate clean PDF case summaries for review or sharing. Designed for surgeons, trainees, and educators, HeartChart provides a fast way to document operative-style coronary anatomy and procedural details in a clear visual format. Key Features Draw CABG grafts Illustrate bypass graft configuration directly on a heart diagram to create a quick visual summary of the case. Add associated procedures Document additional non-CABG procedures such as valve surgery or other operative details. Generate professional PDFs Export a clean case summary as a PDF for sharing, review, or documentation. Save cases With an active subscription, cases can be saved for later reference and retrieval. Simple workflow Create a case, add procedural details, and generate a shareable PDF in just a few steps. Designed for Clinical Education HeartChart is intended to help visualize cardiac surgical procedures and illustrate operative concepts. It can be useful for: • surgical education • operative planning discussions • case review • teaching conferences Important Notice HeartChart is a visualization and documentation tool only. It does not provide medical advice, diagnosis, or treatment recommendations and should not be used for clinical decision-making. Users are responsible for ensuring that any information entered into the app complies with applicable patient privacy and confidentiality requirements. Subscription HeartChart offers an optional yearly auto-renewing subscription that enables saving cases within the app. Subscriptions are managed through your Apple App Store account and may be canceled at any time through your device’s subscription settings. Support Support information is available at: https://heart-chart.com/support
Screenshots
Verdict
The clearest difference is rating: Heart Chart at 4.5 against CathSource's 1.6. Heart Chart also leads on review sentiment (75% vs 38%) and update cadence (every 3 days vs every 2 months). CathSource's advantage is in-app purchases (none vs 1) and ratings volume (23 vs 2). 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
Both are free to download. Heart Chart sells 1 in-app purchase, starting at $2.99 per year. CathSource asks for nothing beyond the download.
Heart Chart holds the better App Store score, 4.5 against 1.6. That said, the two scores are not equally well evidenced: CathSource has 23 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 38% of CathSource's written reviews are positive against 75% of Heart Chart's.
CathSource ships an update every 2 months, Heart Chart every 3 days. The most recent releases landed on October 12, 2026 and October 2, 2026 respectively.
| Parameter | CathSource | Heart Chart |
|---|---|---|
| Price | Free | Free |
| Rating | 1.6 (23 ratings) | 4.5 (2 ratings) — better |
| Positive reviews | 38.5% of reviews | 75.0% of reviews — better |
| Number of ratings | 23 — better | 2 |
| Update frequency | Every 2 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Freemium — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.5 — better | 26.0 |
| Further details — not scored | ||
| Size | 79 MB | 11 MB |
| Age rating | 12+ | 4+ |
| Developer | ECGsource LLC | Bender Apps, LLC |
Customer experience
CathSource
Heart Chart
In-app purchases
CathSource
No in-app purchases
Heart Chart
- HeartChart Premium$2.991 Year









