ECG Link + HRV, QTc Trends

Standard Apple EULA ：https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ [Introduction] ECGLink is a private local visualization and reference log tool designed for Apple Watch users. It reads your ECG records securely via Apple HealthKit and provides a comprehensive view of ECG waveforms, Heart Rate Variability (HRV) scatter plots, and simple PDF report generation on your iPhone or iPad. All health data remains stored locally on your device to ensure maximum privacy. [Key Features] * ECG Waveform Review: Visualize raw ECG data with high-resolution rendering, allowing you to scroll and examine waveform details. * HRV Poincaré Scatter Plots (VIP): Convert raw R-R interval data into Poincaré scatter plots to visualize heart rate variability distribution. * Physiological Estimations: Provide mathematical references and rule-based estimations for standard intervals like PR and QTc (calculated via Bazett formula). * Export PDF Reports (VIP): Generate formatted ECG report PDFs for convenient logging, local printing, or manual sharing. * Local Symptom Notes: Tag symptoms (e.g., palpitations, chest tightness, dizziness) and write personal notes alongside your recording. * Academic References: Comprehensive citations and references from official medical entities (AHA, NIH) and peer-reviewed journals are cited within the app and report footers. [Privacy Commitment] ECGLink is designed with local-first data isolation. Your health records, ECG waves, symptom tags, and local settings remain securely within your device's sandbox. We do not transmit or upload your health data to any server. [Medical Disclaimer] 1. Not a Medical Device: ECGLink is NOT a medical device. It does not diagnose, treat, prevent, or recommend treatments for any medical conditions. All estimated metrics (such as HRV, PR, QTc) are for reference and educational use only. 2. Rhythm Classification: All rhythm classifications (e.g., Sinus Rhythm, Atrial Fibrillation) are performed and categorized by the FDA-cleared Apple Watch ECG system. ECGLink only visualizes existing HealthKit data and does not independently analyze or reclassify arrhythmias. 3. Seek Medical Consultation: Do not change medications or skip healthcare professional consultation based on the app's contents. Always seek professional advice if you feel unwell or suspect any health issues.