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The Most Advanced ECG App for iPhone & Apple Watch

Clinical-grade ECG analysis.
In your pocket.

HeartLab transforms your Apple Watch ECG into comprehensive cardiac insights that even your doctor will appreciate. Advanced arrhythmia detection, complete HRV analysis, AI-powered explanations, and professional medical reports.

12+ HRV Metrics Analyzed
5 Arrhythmia Types Detected
100% On-Device Privacy
HeartLab App Screenshots
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What no other app does

HeartLab goes far beyond what Apple's Health app shows you. Here's what makes us unique.

AI-Powered Explanations

Don't understand medical terminology? Our AI assistant explains your ECG results in plain language, answers your questions, and helps you understand what your heart data actually means.

Complete HRV Analysis

Get the full picture of your heart rate variability with SDNN, rMSSD, pNN50, and Poincaré plots. The same metrics used in professional cardiac research, now accessible on your iPhone.

Professional PDF Reports

Generate detailed medical-grade reports that you can share with your cardiologist. Include ECG waveforms, measurements, HRV data, and detected anomalies in a format doctors recognize and trust.

Metrics That Matter

HeartLab analyzes your ECG with the same rigor as professional cardiac equipment

R-R Intervals
Precise measurement of every heartbeat interval for accurate rhythm analysis
SDNN
Standard deviation of NN intervals - key indicator of overall heart health
rMSSD
Root mean square of successive differences - reflects parasympathetic activity
pNN50
Percentage of adjacent intervals differing by more than 50ms
Poincaré Plot
Visual representation of heart rate dynamics and variability patterns
Cardiac Score
Proprietary algorithm combining multiple metrics into one easy-to-understand score

Everything you need for complete heart analysis

Professional tools designed for everyone, with the simplicity you expect from the best apps.

01

Automatic ECG Import

HeartLab seamlessly connects to Apple Health and automatically imports all your Apple Watch ECG recordings. No manual export, no complicated setup. Just record an ECG on your watch, and it appears in HeartLab within seconds.

  • Instant sync with Apple Health
  • Historical ECG data import
  • Organized timeline view
ECG Analysis with waveform and PAC/PVC detection
02

Intelligent Arrhythmia Detection

Our advanced algorithm analyzes every single heartbeat to detect PAC, PVC, Bigeminy, Trigeminy, and suspected AFib. HeartLab goes far beyond what Apple's built-in ECG app can show you.

  • PAC & PVC detection
  • Bigeminy & Trigeminy patterns
  • Beat-by-beat analysis
Arrhythmia Detection with PAC and PVC alerts
03

Trend Analysis & History

Track how your heart health evolves over time. HeartLab stores all your ECG analyses and shows you trends in your heart rate, HRV metrics, and arrhythmia occurrences. Spot patterns that could indicate improving or declining cardiac health.

  • Long-term trend visualization
  • Comparative analysis
  • Health pattern recognition
Health Trends with Heart Rate and HRV charts
04

AI-Powered Assistant

Don't understand medical terminology? Our AI assistant explains your ECG results in plain language, answers your questions, and helps you understand what your heart data actually means.

  • Plain language explanations
  • Personalized insights
  • Ask anything about your ECG
AI Assistant explaining ECG results
05

Wellness & Mindfulness

HeartLab isn't just about data — it helps you take care of your whole self. Guided breathing exercises, body scan meditation, mood tracking, and a personal journal to understand the connection between your emotions and heart health.

  • Guided breathing & meditation
  • Mood & emotion tracking
  • Personal health journal
Wellness exercises and mood tracking

Built with precision and privacy

The technology behind HeartLab ensures accuracy, reliability, and complete data privacy.

100% On-Device Processing

Your ECG data never leaves your iPhone. All analysis is performed locally using advanced algorithms optimized for mobile devices. No cloud processing, no data uploads, complete privacy.

GDPR & HIPAA Considerations

Designed with healthcare data regulations in mind. Your sensitive health information is protected with the highest standards of data security and privacy protection.

Apple Health Integration

Seamless integration with Apple's HealthKit framework. HeartLab reads your ECG data directly from Apple Health, ensuring compatibility and data integrity.

Continuous Updates

Our team of developers and cardiac health experts continuously improve HeartLab's algorithms and add new features based on the latest research and user feedback.

Start in under a minute

Getting clinical-grade ECG analysis has never been easier.

1

Download HeartLab

Get HeartLab free from the App Store. The app requires iOS 15 or later and an Apple Watch with ECG capability (Series 4 or newer).

2

Grant Health Access

Allow HeartLab to read your ECG data from Apple Health. This is a one-time setup that enables automatic sync of all your recordings.

3

Record Your ECG

Use your Apple Watch to take an ECG as you normally would. The recording automatically appears in HeartLab for analysis.

4

Get Insights

View detailed analysis including heart rate, HRV metrics, arrhythmia detection, and your personal Cardiac Score. Ask our AI assistant any questions.

HeartLab vs Apple's Built-in ECG

See why HeartLab is the essential companion for your Apple Watch

Feature Apple ECG HeartLab
Atrial Fibrillation detection
PAC detection
PVC detection
Bigeminy & Trigeminy
HRV analysis (SDNN, rMSSD, pNN50)
Poincaré plots
AI-powered explanations
PDF reports for doctors
ECG trend tracking
100% on-device privacy

Trusted by thousands worldwide

See why users and healthcare professionals recommend HeartLab

4.6
★★★★★
10K+ Users
1K+ Reviews
47 Countries
★★★★★

"Showed the PDF report to my cardiologist and he was impressed. Said the HRV data was actually useful for his assessment. Finally an app that does more than just show you a squiggly line."

MR
Michael R. California
★★★★★

"Finalmente capisco i miei ECG! Soffro di extrasistoli da anni e questa app mi ha aiutato tantissimo a capire quando sono più frequenti. Il cardiologo ha apprezzato i report."

LB
Luca B. Milano
★★★★★

"I'm 67 and my grandson set this up for me. Surprisingly easy to use once you get the hang of it. Check my heart every morning now. Gives me peace of mind."

EM
Eleanor M. Florida
★★★★★

"HRV tracking is exactly what I needed for my cycling training. Way more detailed than Garmin or Whoop. The rMSSD trends actually help me plan recovery days."

JK
James K. Sydney
★★★★★

"Excellente app. Mon médecin utilise maintenant mes rapports PDF lors des consultations. Ça change vraiment la façon dont on peut discuter de sa santé cardiaque."

PD
Pierre D. Paris
★★★★★

"As someone with health anxiety, this app has been a game changer. Instead of panicking, I can check my ECG and see that everything is actually fine. The AI explanations help a lot."

LS
Lisa S. Melbourne
★★★★★

"Best ECG app I've tried and I've tried most of them. The PDF exports look professional enough that my doctor actually takes them seriously. Worth the subscription."

AK
Andrew K. Boston
★★★★★

"Caught my PVCs which my regular doctor missed. App works great. The insights are incredibly detailed and helpful for tracking my heart health over time."

RH
Rachel H. New York
★★★★★

"La migliore app per monitorare il cuore. Uso l'Apple Watch da anni ma solo con HeartLab ho iniziato a capire veramente i miei dati. Consigliatissima!"

MF
Marco F. Roma
★★★★★

"After my heart surgery, this app gave me confidence to track my recovery. The detailed metrics helped me and my doctor monitor my progress. Incredible tool."

DM
David M. London
★★★★★

"Sehr beeindruckend! Die App erkennt Arrhythmien, die mein Arzt übersehen hat. Die PDF-Berichte sind professionell und mein Kardiologe war sehr zufrieden damit."

TM
Thomas M. Berlin
★★★★★

"Perfect for athletes who want to optimize recovery. The Poincaré plots and HRV analysis are on par with professional equipment. Game changer for my training."

SC
Sophie C. Amsterdam
★★★★★

"Increíble aplicación. Detectó mis extrasístoles y me ayudó a entender mejor mi condición. Los informes PDF son muy profesionales. Muy recomendada."

CR
Carlos R. Madrid
★★★★★

"Finally an app that takes Apple Watch ECG seriously. The analysis depth is incredible. My cardiologist now asks me to bring HeartLab reports to every appointment."

JW
Jennifer W. Toronto
★★★★★

"Ottima per chi soffre di ansia. Invece di preoccuparmi, ora posso controllare il mio ECG e vedere che tutto va bene. Le spiegazioni dell'AI sono molto utili."

GV
Giulia V. Napoli
★★★★★

"The AI assistant is incredibly helpful. It explains complex medical terms in simple language. This app has made me much more informed about my heart health."

BT
Brian T. Chicago
★★★★★

"Uso HeartLab ogni giorno da 6 mesi. Ha completamente cambiato il modo in cui monitoro la mia salute cardiaca. L'interfaccia è bellissima e intuitiva."

AP
Alessandro P. Torino
★★★★★

"As a nurse, I appreciate how accurate and detailed this app is. I recommend it to all my patients with Apple Watches. The medical reports are excellent."

KN
Karen N. Dublin
★★★★★

"Muito melhor que o app padrão da Apple. Os gráficos de Poincaré e análise de HRV são profissionais. Vale cada centavo da assinatura."

RM
Ricardo M. São Paulo
★★★★★

"This app detected irregular heartbeats that I didn't even know I had. Shared the report with my doctor and now I'm getting proper treatment. Literally life-changing."

MW
Mark W. Seattle

Frequently Asked Questions

Everything you need to know about HeartLab

What arrhythmias can HeartLab detect?

HeartLab can detect PAC (Premature Atrial Contractions), PVC (Premature Ventricular Contractions), Bigeminy, Trigeminy patterns, and suspected Atrial Fibrillation (AFib). This goes beyond Apple's built-in ECG app which only detects AFib.

Is my ECG data private with HeartLab?

Yes, 100%. All ECG analysis is performed entirely on your iPhone. Your health data never leaves your device and is never uploaded to any cloud servers.

Which Apple Watch models are compatible with HeartLab?

HeartLab works with Apple Watch Series 4 or newer, which have ECG capability. You also need an iPhone with iOS 15 or later.

Can I share my ECG results with my doctor?

Yes, HeartLab generates professional PDF reports that include ECG waveforms, measurements, HRV data, and detected anomalies in a format that doctors recognize and trust.

How accurate is HeartLab compared to a clinical ECG?

HeartLab uses the same single-lead ECG data from your Apple Watch that meets medical-grade standards (FDA-cleared hardware). Our algorithms analyze R-R intervals, QT intervals, and waveform morphology with clinical precision. However, HeartLab is not a medical device and does not replace a 12-lead clinical ECG.

What is HRV and why does HeartLab measure it?

Heart Rate Variability (HRV) measures the variation in time between heartbeats. Higher HRV generally indicates better cardiovascular fitness and stress resilience. HeartLab calculates SDNN, RMSSD, and pNN50 metrics from your ECG recordings to help you track your autonomic nervous system health over time.

Does HeartLab work without an internet connection?

Yes, HeartLab works completely offline. All ECG analysis algorithms run locally on your iPhone, so you can record and analyze ECGs anywhere — on a plane, in remote areas, or simply without Wi-Fi.

How is HeartLab different from the built-in Apple ECG app?

Apple's ECG app only checks for atrial fibrillation (AFib) and shows a basic waveform. HeartLab provides detailed analysis including 5+ arrhythmia types, QT interval measurement, HRV metrics, signal quality scoring, and exportable PDF reports — all from the same Apple Watch recording.

Is HeartLab a medical device?

No, HeartLab is a wellness and educational tool designed to help you better understand your heart rhythm patterns. It is not FDA-cleared as a medical device and should not be used to diagnose or treat medical conditions. Always consult your healthcare provider for medical decisions.

How long does an ECG recording take with HeartLab?

A standard ECG recording takes 30 seconds using your Apple Watch — the same duration as Apple's built-in ECG app. HeartLab then analyzes the recording in under 2 seconds, providing instant results with detailed metrics.

Can HeartLab track my heart health over time?

Yes, HeartLab includes a Trends feature that tracks your heart rate, HRV, QTc interval, and arrhythmia frequency over days, weeks, and months. This helps you identify patterns and share meaningful data with your doctor.

Is HeartLab free to use?

HeartLab offers a free tier with basic ECG analysis. Premium features including advanced arrhythmia detection, detailed HRV analysis, PDF report generation, and historical trends are available through an affordable subscription.

Take control of your heart health today

Join thousands of users who trust HeartLab to understand their cardiac health better than ever before.

Download on the App Store

Free to download. Premium features available via subscription.

Medical Disclaimer

HeartLab is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease or health condition. The app is for informational and educational purposes only. Always consult a qualified healthcare professional for medical advice, diagnosis, or treatment. In case of a medical emergency, call your local emergency services immediately.

Download on the App Store