epTools vs EP Diagram
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
epTools
This app provides a suite of tools for diagnosing and managing cardiac rhythm disorders. It offers algorithms for localizing arrhythmias, differentiating conditions like WPW from FVF, and assessing disease risks. Users can visualize progress, save analysis paths, and access cited scientific references.
- Arrhythmia localization algorithms
- Differentiate WPW from FVF
- Atrial tachycardia localization
- Ventricular tachycardia localization
- Disease assessment criteria
- Save decision path images
- Access scientific references
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Trusted for over 15 years by heart rhythm professionals worldwide, epTools is a collection of useful tools for the evaluation of heart rhythm disorders. It is available on iPhone and iPad devices. Resources include algorithms used to localize arrhythmia substrates and reference guides to assist in the identification and, management of cardiac rhythm disorders and tools to calculate commonly used measurements and risk scores. Peer-reviewed algorithms are implemented by tools via an intuitive user interface. References are provided. Tools guide the user or AI through a series of questions to arrive at an answer while providing a graphical visualization of their progress and result of their analysis. Use of the save path to image feature allows users to save an image of the current decision path when using many of the decision analysis tools included. These images, which appear in the photo album, may be useful to communicate findings with colleagues. Included tools: Preexcitation variant localization: Arruda, Milstein, Taguchi , D'Avila, Li, Pambrun, Baek and Crinion and O'Leary et al. Atrial tachycardias: Ellenbogen and Kistler et al (localization ) De Ponti et al tool (calculates the appropriate mapping window for isthmus identification) Miyazaki et al (localizes macro reentrant ATs based on pacing responses) Ischemic ventricular tachycardia localization: Miller, Segal and Andreu et al) Idiopathic ventricular tachycardia and premature ventricular contraction: Ito, Park and Enriquez et al (localization) ABC-VT Risk Score Differentiation of left vs right ventricular outflow tract sites: QRS-RVA Interval V₂S/V₃R Index TZ Index V₂ Transition ratio R/S-wave Amplitude, R-Wave Duration, R-wave amplitude, V₂QRSI40 and RV₁-₃ indices. Differentiate endocardial from epicardial VTs: Maximum deflection index Daniels and Berruezo et al criteria Differentiate SVT from VT: Brugada, Verckei and Moccetti et al Disease Assessment: Consensus criteria for ARVD/C and Short QT Syndrome 5-yr risk of SCD in HCM (O'Mahon et al, and AHA)and LQTS (1-2-3-LQTS-Risk) 5-yr risk of life threatening VTA with LMNA variant Inadequate DFT safety margin (Hsu et al ) LA arrhythmogenic substrate (Kosiuk et al, D'Ambrosio et al) 30-day mortality after PPM and ICD lead extraction (Brunner et al) 1-4 year mortality in 1° prevention ICD placement (Bilchick et al, SHOCKED) Shanghai score (Brugada Syndrome), VT prediction in ARVD/C (Cadrin-Tourigny et al.) Suspicious Index In Lyme Carditis (SILC) PADIT and BLISTER CIED infection risk Misc: Confirm conduction system capture with LBBAP. myPace personalized heart rate calculator A CIED/electrocautery manager is included. Detailed preoperative plans can be created and shared by text or email. Clinical guidelines and consensus statement resource i CHADS₂, CHA₂DS₂VASc and ATRIA stroke risk, HAS-BLED bleeding risk scores, QT correction heart rate (Bazett or Fredericia, Hodges) and left bundle branch block (Bogosian and Yankelson et al)
EP Diagram
This app simplifies the analysis of electrocardiograms using interactive ladder diagrams. It allows for quick creation of publication-quality diagrams with automatic calculations for measurements and impulse origins. Enhance your understanding of cardiac arrhythmias with this advanced digital tool.
- Interactive ladder diagrams
- Automatic calculation of measurements
- Impulse origin and block calculation
- Customizable ladder templates
- Add fibrillation periods
- Publication-quality diagrams
- Shareable diagrams
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EP Diagram is a teaching and learning tool for the analysis of electrocardiograms using ladder diagrams. Ladder diagrams are a classic method of analysing heart rhythms and conduction disturbances. The ladder is divided into anatomic regions and lines are drawn indicating conduction. EP Diagram goes much further than the traditional ladder diagram drawn by hand. Using it you can easily and quickly draw publication quality ladder diagrams which are interactive, scrollable, and zoomable. You can style these diagrams as you wish, have measurements, impulse origin, and block calculated automatically, and can edit and create your own ladders templates. You can even add periods of fibrillation with just one finger tap. Diagrams are automatically saved as files and can be shared with others. EP Diagram will improve your understanding of cardiac arrhythmias.
Screenshots
Verdict
The clearest difference is price: EP Diagram at $4.99 against epTools's $19.99. EP Diagram also leads on update cadence (every 6 weeks vs every 4 months) and review sentiment (100% vs 88%). epTools's advantage is chart position (#199 vs unranked). On ads, in-app purchases, device support and iOS requirement 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
epTools costs $19.99 and EP Diagram $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
epTools ships an update every 4 months, EP Diagram every 6 weeks. The most recent releases landed on September 25, 2026 and September 14, 2026 respectively.
| Parameter | epTools | EP Diagram |
|---|---|---|
| Price | $19.99 | $4.99 — better |
| Rating | 4.8 (519 ratings) — better | — |
| Positive reviews | 88.2% of reviews | 100.0% of reviews — better |
| Number of ratings | 519 — better | — |
| Update frequency | Every 4 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Best chart rank | #199 — better | — |
| Devices | iPhone, iPad | iPhone, iPad, Mac — better |
| Requires iOS | 16.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 30 MB | 15 MB |
| Age rating | 17+ | 12+ |
| Developer | Busy Being Born Solutions, LLC | EP Studios |
Customer experience
epTools
EP Diagram
Bugs and requests
epTools
Reported bugs
1 issue- Crash problem fixed
Requested features
10 requests- Add CAAP-AF
- Better tools for PVC localization
- More explanations in each pathway
- German translation
- Links to papers with algorithms
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- New algorithm using only lead aVR for differential diagnosis of wide QRS complex tachycardia
- Diagnostic features for different arrhythmia (AVNRT, AVRT)
- HD format for iPad compatibility
- More algorithms
- Aortic cusp, RVOT, entrainment criteria, long QT, AFib ablation techniques
EP Diagram
Not enough reviews yet to summarise bugs or requests.
In-app purchases
epTools
No in-app purchases
EP Diagram
No in-app purchases
Questions
Is epTools free?
Is EP Diagram free?
Do epTools or EP Diagram have ads?
Which is updated more often, epTools or EP Diagram?
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