HeartLab vs ECG+: ECG App Comparison
ECG+ shows raw waveforms and basic measurements. HeartLab detects arrhythmias. Compare cloud-based GPT analysis against on-device PVC/PAC detection with 12+ HRV metrics.
Feature Comparison
ECG+ by Heartworks (Alfred) is a popular Apple Watch ECG app that displays raw waveform data and provides basic measurements like heart rate, QT interval, QTc, and PR interval. It also integrates with GPT for AI-powered explanations. HeartLab takes a fundamentally different approach: instead of just showing measurements, it actively detects arrhythmias including PVCs, PACs, bigeminy, and trigeminy, while providing 12+ HRV metrics and on-device processing.
| Feature | HeartLab | ECG+ |
|---|---|---|
| AFib Detection | ✓ | ✗ |
| PVC Detection | ✓ | ✗ |
| PAC Detection | ✓ | ✗ |
| Bigeminy/Trigeminy | ✓ | ✗ |
| HRV Metrics | 12+ | Limited |
| Poincaré Plot | ✓ | ✗ |
| AI Assistant | On-device | GPT (cloud) |
| PDF Reports | ✓ | ✗ |
| On-Device Processing | ✓ | ✗ |
| Raw Waveform View | Coming soon | ✓ |
| QT/QTc Measurement | ✓ | ✓ |
| Cardiac Score | ✓ | ✗ |
| Languages | 16 | 5 |
| Base Price | Free | Free |
Why Choose HeartLab
HeartLab detects arrhythmias; ECG+ only shows measurements. The key difference is that HeartLab actively identifies PVCs, PACs, bigeminy, and trigeminy in your ECG recordings, while ECG+ displays measurements without arrhythmia classification. HeartLab also provides 12+ HRV metrics, a Poincaré plot, cardiac scoring, and trend tracking.
Privacy is another major advantage: HeartLab processes everything on-device, while ECG+'s GPT integration requires sending data to cloud servers. HeartLab supports 16 languages compared to ECG+'s 5.
Why Choose ECG+
ECG+ is great for viewing raw waveform data. If you want to see the actual ECG waveform from your Apple Watch recording and share it visually, ECG+ provides an excellent raw waveform viewer. It also shows useful basic measurements (HR, QT, QTc, PR interval) in a clean interface.
The GPT integration can be helpful for general ECG education, though it should not be used for diagnosis. ECG+ is a good choice if waveform visualization is your primary need.
FAQ
Can ECG+ detect PVCs or PACs?
No. ECG+ displays ECG measurements like heart rate, QT, QTc, and PR intervals, but does not perform arrhythmia detection. HeartLab detects PVCs, PACs, bigeminy, trigeminy, and AFib.
Does ECG+ process data on-device?
ECG+'s GPT AI feature sends data to cloud servers for processing. HeartLab processes all ECG data entirely on-device for maximum privacy.
Which app shows the raw ECG waveform?
ECG+ provides a raw waveform viewer. HeartLab focuses on analysis and arrhythmia detection rather than raw waveform display, though this feature is planned for a future update.
How many languages does each app support?
HeartLab supports 16 languages. ECG+ supports approximately 5 languages.
Can I generate PDF reports with ECG+?
ECG+ does not offer PDF report generation. HeartLab generates shareable PDF reports that you can bring to your doctor.
Information accurate as of February 2026. Features and pricing may change. Check respective app stores for the latest details. HeartLab is not a medical device and does not replace professional medical advice.
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HeartLab delivers clinical-grade ECG analysis directly from your Apple Watch — arrhythmia detection, HRV analysis, and professional reports.
