Cardio Z vs EP Mobile
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cardio Z
This medical app provides instant Z-scores and centiles for pediatric cardiology measurements. It simplifies the calculation of vital cardiac and pediatric parameters, offering guidance and saving patient data for easy sharing. Designed for healthcare professionals, it streamlines clinical assessments and monitoring.
- Instant Z-score and centile calculations
- Supports numerous cardiac and pediatric measurements
- Offline functionality
- Patient data saving and sharing
- Customizable user settings
- Guidance tips for measurements
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Instant Z-Scores For All The Paediatric Cardiology Parameters You Review Everyday. Cardio Z has been developed by the experienced Paediatric Cardiology team at Evelina Children's Hospital, London, UK in collaboration with the technology company UBQO. The application makes it easy to calculate Z-scores and centiles for the many cardiac and paediatric measurements that are made in normal clinical practice. Cardio Z distils a wealth of clinical research parameters into a single accessible format. Z–scores and centiles are a means of expressing how far a measurement is above (positive Z-score) or below (negative Z-score) the average for the size or age of a patient. They are particularly important in assessing and monitoring growing patients, from fetal life though to adulthood. Health professionals need to be able to access the normal ranges for cardiac parameters at every age and size, and cross-checking of measurements can be time-consuming and inconvenient. Cardio Z will prove invaluable for both clinicians working directly in Paediatric Cardiology, and those who work in other fields of Paediatrics. Cardio Z allows users to access Z-scores without the need for an internet connection, or the requirement to input the same data in multiple calculators. Users can define their own settings so that they can be sure that their use of z-scores is consistent over time, whilst still allowing flexibility for the experienced clinician. Comprehensive guidance is available ensuring that measurements are consistent with those of the original research, allowing valid comparisons. Cardio-Z creates a summary of all z-scores for each patient, which can then be saved, e-mailed or printed. Simple, reliable and time-saving. FULL LIST OF FEATURES: - Cardio Z allows calculation of z-scores of: - Height, weight, BMI and head circumference - Clinic blood pressure, with calculation of a user-defined 'target centile' blood pressure - Echocardiographic measurements of most cardiac structures, including valves, chambers, vessels and coronary arteries - Fetal echocardiographic measurements, using gestational age, femur length or biparietal diameter as size reference - M-mode echocardiography, including TAPSE - Pulsed wave velocities, including E/E' ratio and E/A ratio - Tissue Doppler velocities and time intervals. Including Isovolumetric Contraction Time (IVCT), Isovolumetric Relaxation Time (IVRT), Ejection Time and Myocardial Performance Index - Discriminant scores for neonatal aortic stenosis with borderline left ventricle - ECG parameters (2nd and 98th centiles) and corrected QT interval calculation EXTRA FEATURES: - Guidance tips for measurements, including diagrams and notes of the methods of the original researchers - Centiles, as well as z-scores, displayed for all parameters - No need to re-enter height and weight: baseline data only needs to be entered once - Generation of a .pdf summary which can be saved, e-mailed or printed - Saved patient Z-score summaries can be accessed and edited at a later date - Short-cut keys for frequently used parameters - Body surface area calculator can be defined to use the same algorithms as the original research - Cardio Z reduces the inconvenience of making Z-score calculations, and improves the correct application of this important clinical tool. The App is not a substitute for clinical judgement or institutional policies, thus it should complement and not replace normal procedures for making clinical decisions. We hope you enjoy using Cardio Z!
EP Mobile
This medical app offers a comprehensive suite of tools for cardiac electrophysiologists and related healthcare professionals. It provides calculators, risk scores, diagnostic criteria, and drug references to aid in the diagnosis and management of cardiac arrhythmias. Features are regularly updated and referenced for accuracy.
- Cardiac arrhythmia diagnostic criteria
- Risk score calculators
- Drug and anticoagulant references
- Pacing maneuver tools
- Interval to rate conversion
- Referenced modules with article links
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EP Mobile provides tools for cardiac electrophysiologists, cardiologists, cardiology fellows, internists, emergency room physicians, medical students, nurses, technicians, and other health care workers who deal with cardiac arrhythmias. If you have suggestions, features you'd like to see, or complaints, please email us! EP Mobile -- The Swiss Army Knife of Electrophysiology! Features: - All modules fully referenced with links to articles - Copy results to clipboard to paste into other apps - Below is a limited list of modules, more modules are added frequently - Pacing maneuvers: para-Hisian pacing and RV apex vs base pacing - Heart rhythm drugs and anticoagulants reference: dabigatran, dofetilide, rivaroxaban, sotalol, apixaban, edoxaban - Creatinine clearance calculator - Warfarin clinic utility - Interval to rate conversion - QTc calculator (Bazett, Fridericia, Sagie and Hodges formulas) - Additional QTc calculators for IVCD - QT prolongation risk score - Date calculator - Atrial fibrillation risk scores (CHADS2, CHA2DS2-VASc, ATRIA scores) - Bleeding risk scores (HAS-BLED, HEMORR2HAGES, SAMe-TT2R2, ORBIT) - Hypertrophic Cardiomyopathy SCD risk scores (2002, 2014, 2022, 2024) - ICD implantation risk score - ICD mortality risk score - Syncope risk scores (EGSYS, Martin, OESIL, SF) - CMS (Medicare) ICD guidelines calculator, now updated to new 2018 criteria - Atrial tachycardia location algorithm - VT localization algorithms - Epicardial vs endocardial VT - Outflow tract VT - Mitral annular VT - Entrainment mapping - WPW accessory pathway location (Arruda, Modified Arruda, D'Avila, Milstein and others) - Long QT diagnosis, subtypes, and ECG patterns - Short QT syndrome diagnosis - Brugada syndrome diagnosis - Early Repolarization syndrome diagnosis - LVH ECG criteria, including Romhilt-Estes score and others - RVH ECG criteria - True LBBB criteria - ARVC/D 1994 and 2010 diagnostic criteria - ARVC/D risk calculator - Normal EP values - Wide complex tachycardia diagnosis
Screenshots
Verdict
The clearest difference is rating: EP Mobile at 5.0 against Cardio Z's 4.0. EP Mobile also leads on review sentiment (100% vs 61%) and update cadence (every 3 months vs every 21 months). Cardio Z's advantage is iOS requirement (10.0 vs 17.0). On ratings volume, ads, in-app purchases and monetization model 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
Cardio Z costs $6.99 and EP Mobile $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
EP Mobile holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews point the same way: 61% of Cardio Z's written reviews are positive against 100% of EP Mobile's.
Cardio Z ships an update every 21 months, EP Mobile every 3 months. Both last shipped on November 1, 2026.
| Parameter | Cardio Z | EP Mobile |
|---|---|---|
| Price | $6.99 | $1.99 — better |
| Rating | 4.0 (3 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 61.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 | 4 — better |
| Update frequency | Every 21 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Best chart rank | — | #185 — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 10.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 15 MB | 13 MB |
| Age rating | 4+ | 12+ |
| Developer | UBQO Limited | EP Studios |
Customer experience
Cardio Z
EP Mobile
In-app purchases
Cardio Z
No in-app purchases
EP Mobile
No in-app purchases








