Tested and reviewed by a cardiologist
AI heart health apps are transforming the way we monitor and protect our heart. But how do you know if an app truly uses AI or just claims to?
As a practicing cardiologist, I’ve tested dozens of devices and apps that use artificial intelligence for cardiac monitoring. Here are the top 5 tools that really deliver in 2025.
🥇 1. KardiaMobile 6L – The Most Accurate AI ECG Device for Patients
✅ Key features:
- 6-lead ECG in 30 seconds
- Detects atrial fibrillation, tachycardia, bradycardia, and more
- FDA-cleared algorithm, exports full report as PDF
- App with real-time AI interpretation
🧠 Why it’s truly AI-powered:
It uses machine learning models trained on millions of ECGs with diagnostic accuracy that rivals clinical interpretation.
📦 Where to buy:
📚Sources
- 🔗 Validation of a Handheld 6-Lead Device for QT Monitoring
- 🔗 FDA Clearance Announcement – AliveCor Press Release
🥈 2. Withings ScanWatch 2 – The Smartwatch That Actually Cares About Your Heart
✅ Key features:
- Built-in 1-lead ECG
- Detects AFib and sleep apnea
- Tracks heart rate, oxygen, respiratory rate
- App with AI pattern recognition
🧠 Why it’s truly AI-powered:
All alerts are based on medically validated predictive models. It’s FDA-cleared and CE-marked as a medical device.
📦 Where to buy:
👉 Withings ScanWatch 2 on Amazon
📚Sources
🥉 3. QardioArm + App – Smart Blood Pressure Monitoring with Predictive Alerts
✅ Key features:
- Clinically validated BP monitor
- AI-driven trends, risk alerts, smart notifications
- Syncs with Apple Health, Alexa, and IFTTT
🧠 Why it’s truly AI-powered:
The app tracks your BP patterns over time and warns you if trends suggest emerging cardiovascular risk.
📦 Where to buy:
👉 QardioArm Blood Pressure Monitor on Amazon
📚Sources
- 🔗 The QardioArm App in the Assessment of Blood Pressure and Heart Rate: Reliability and Validity Study – JMIR (2017)
- 🔗 QardioArm Blood Pressure Monitoring in a Population With Type 2 Diabetes – JMIR (2020)
- 🔗 QardioArm vs Omron M3 in Chronic Kidney Disease – JMIR (2019)
- 🔗 Validation in an Obese Population – JMIR Mhealth (2018)
🧠 4. Apple Watch Series 9 – The Most Advanced Consumer-Grade ECG
✅ Key features:
- Built-in ECG with AFib detection
- Continuous monitoring: HR, HRV, VO2 max, SpO₂
- Integrated with iOS HealthKit
🧠 Why it’s truly AI-powered:
AFib detection is FDA-approved and relies on real-time AI trained on multi-signal patterns, validated in multiple trials.
📦 Where to buy:
👉 Apple Watch Series 9 on Amazon
📚Sources
- 🔗 FDA Clearance – ECG Apple Watch (DEN180044)
- 🔗 NEJM – Apple Heart Study
- 🔗 Apple Health & ECG Overview
⚕️ 5. Welltory – AI-Powered HRV and Stress Analysis App
✅ Key features:
- Measures HRV with smartphone camera
- Uses AI to assess stress, recovery, and fatigue
- Tailored advice based on physiological trends
🧠 Why it’s truly AI-powered:
Welltory’s app is built on neural networks that analyze hundreds of input signals and adapt over time.
📱 Download here:
📚Sources
- 🔗 Welltory – Science & Validation
- 🔗 Front Public Health – HRV Review (2017)
- 🔗 MDPI Sensors – HRV + Machine Learning (2021)
❗ Note: Why These Apps Made the List
All featured apps/devices:
- Are backed by peer-reviewed evidence or regulatory approval (FDA, CE)
- Use actual AI or machine learning models (not just rule-based systems)
- Have public documentation of performance and validation
🧭 Choosing the Right AI Heart App
| Your Goal | Best App |
|---|---|
| Need reliable home ECG? | KardiaMobile 6L |
| Want all-in-one heart data in a watch? | Withings ScanWatch 2 |
| Focused on blood pressure? | QardioArm |
| Looking for lifestyle + heart tracking? | Apple Watch Series 9 |
| Interested in HRV and stress levels? | Welltory |
💡 See also: Smartwatch Heart Monitor: Can It Really Detect Heart Problems? What a New NEJM Case Report Reveals
❗ Warning: Not All “AI” Apps Are Truly AI
How to spot fake AI claims:
- Look for FDA/CE approval
- Check for peer-reviewed clinical validation
- Avoid apps with vague “AI-powered” claims and no explanation
⚠️ Affiliate Disclosure
Some links in this article are affiliate links. If you purchase through them, Cardio-Facts earns a small commission — at no extra cost to you. We only recommend tools we trust and believe in based on clinical experience.
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