Apple Watch labels a recording as Atrial Fibrillation when it detects an irregularly irregular rhythm with no visible P waves. ECG+ goes one step further to quantify how irregular each AFib recording is and plots it as a trend over time, placing every recording on the full spectrum from mildly to highly irregular. It's a richer picture than a label alone can give. Trends are only as good as the data behind them. A new optional Streak Reminder in Settings notifies you each day you haven't recorded yet, helping you build the consistent habit that makes HRV, QTc, and heart rate trends genuinely meaningful.

This update focuses on two key areas of accuracy improvement: • Respiratory baseline drift and EMG noise from finger contact are common in Apple Watch ECG recordings. Algorithm v1.5 improves how ECG+ handles these signal issues, helping produce cleaner and more stable heartbeat identification. • More precise heartbeat positioning helps produce more accurate RR intervals, which can also improve the reliability of HRV calculations. Please note that all possible findings, including patterns (Couplet, Bigeminy and Quadrigeminy) in ECG+ are for informational and educational purposes only. They are not medical diagnoses, do not replace advice from a qualified healthcare professional, and should not be used for diagnosis, treatment, or medical decision-making.

• ECG+ now detects and marks Quadrigeminy, one of the 5 Beat Repeat Patterns that ECG+ checks. • Quadrigeminy is a repeating pattern where every fourth beat is premature. While not common, it does occur, and when it does, the newly introduced Link Line design on the ECG strip makes it super easy to spot. • Algorithm v1.5 brings significant improvements to ECG analysis accuracy, with better recognition of rhythm patterns, reduced false positives, and more reliable detection of events across all recordings. A special thank you to the users who shared their reports, feedback, and ideas. Your support helped make this improvement possible.

Version 1.14+: • A much better way to process large libraries (5,000+ recordings), and yes some users do have MANY recordings • Filter your ECG recordings by time range, including All Time, Last Year, Last 30 Days, or a custom range. • Daily Streak helps you stay consistent with recordings, supporting more meaningful trends and insights over time. • Time Map highlights when specific types of recordings occur most often throughout the day. • New visual markers for premature beat patterns, including Couplet, Triplet, Bigeminy, and Trigeminy, designed to make patterns easier to recognize. • Directly share your PDF report on the recording strip page • Copyright Notice update covers original ECG+ features developed over the past 5 years, including: ‣ Thumbnail preview window for quick locating beats on recordings ‣ Waveform annotations and markers highlight heart beat with R (normal), V (PVC) and A (PAC) letters ‣ RR and heart rate indicators between beats ‣ Pattern markers with linked visual connections for premature beats (Couplet, Triplet, Bigeminy, and Trigeminy) ‣ Heartbeat Signature with a structured PQRST visualisation The design, visual presentation, and features of ECG+ are original and protected by copyright. We reserve all rights and may take action against unauthorized copying or imitation, through applicable processes, including Apple's official channels according to Apple Design Guideline 4.1 - Copycats

Thanks to everyone who shared feedback for version 1.14 and 1.14.1. Here’s what’s new: • Filter your ECG recordings by time range, including All Time, Last Year, Last 30 Days, or a custom range. • Daily Streak helps you stay consistent with recordings, supporting more meaningful trends and insights over time. • Time Map highlights when specific types of recordings occur most often throughout the day. • New visual markers for premature beat patterns, including Couplet, Triplet, Bigeminy, and Trigeminy, designed to make patterns easier to recognize. • Directly share your PDF report on the recording strip page • Copyright Notice update covers original ECG+ features developed over the past 5 years, including: ‣ Thumbnail preview window for quick locating beats on recordings ‣ Waveform annotations and markers highlight heart beat with R (normal), V (PVC) and A (PAC) letters ‣ RR and heart rate indicators between beats ‣ Pattern markers with linked visual connections for premature beats (Couplet, Triplet, Bigeminy, and Trigeminy) ‣ Heartbeat Signature with a structured PQRST visualisation The design, visual presentation, and features of ECG+ are original and protected by copyright. We reserve all rights and may take action against unauthorized copying or imitation, through applicable processes, including Apple's official channels according to Apple Design Guideline 4.1 - Copycats

Filter your ECG recordings by time range (All Time / Last 1 Year / Last 30 Days / Custom). Daily Streak encourages consistent recording, improving the accuracy of trends and insights. Time Map reveals when specific types of ECG recordings occur most frequently.

Added time-based grouping on the timeline, including sections such as “Today”, “Last Week”, for better timeline organization. Improved stability and resolved a rare crash related to concurrent Firebase access.

Improved insights across pages Explanations are now available in more areas of the app, helping you better understand your ECG data, heart rhythm findings, and health trends. Stability and performance improvements Multiple UI fixes and optimizations for a smoother experience.

GPT now explains PAC/PVC burdens and your overall recording statistics, highlighting changes over time. Improved algorithm delivers more accurate P-wave identification. ECG+ also features a new dark mode icon. Please note, ECG+ is designed for educational use only and is not a diagnostic tool.

GPT now explains PAC/PVC burdens and your overall recording statistics, highlighting changes over time. Improved algorithm delivers more accurate P-wave identification. ECG+ also features a new dark mode icon. Please note, ECG+ is designed for educational use only and is not a diagnostic tool.

ECG+ now features a new dark mode icon. GPT can explain your overall recording statistics and HRV changes over time now. We’ve fixed and cleaned up the messy preview strip that confused many users. We’ve fixed a potential crash issue on iPad and improved overall algorithm performance.

We’ve fixed the recent OpenAI API key issue — the feature is now back up and working smoothly. Please note: ECG+ is not a diagnostic tool. All information provided is for general informational purposes only and is not a substitute for medical advice, diagnosis, or treatment. Always consult a doctor before making any health-related decisions.

· Ask unlimited questions about your ECG reports — all included in your subscription. · Get clearer insights into your HRV trends over time with easy explanations of what’s happening and what matters most. · Enjoy a refreshed UI for a smoother experience. · Bug fixes and performance improvements to make everything run better.

· Ask unlimited questions about your ECG reports — all included in your subscription. · Get clearer insights into your HRV trends over time with easy explanations of what’s happening and what matters most. · Enjoy a refreshed UI for a smoother experience. · Bug fixes and performance improvements to make everything run better.

• Automatic ECG Analysis: Your Apple Watch ECGs are now analyzed as soon as they’re saved on your watch. • Smart Notifications: Get notified when your new ECG result is ready to view. Thanks for using ECG+ to better understand your heart.

• ChatGPT Integration: ECG+ now provides clear, plain-language explanations for your ECG findings — helping you better understand your heart rhythm, patterns, and irregularities. • Polished Interface & Interactions: We’ve fine-tuned animations, transitions, and filters to make the app smoother and more intuitive. • Improved Stability: Better handling of rare cases, edge conditions, and large data sets means a more reliable experience across all devices.

We’ve made several behind-the-scenes improvements to enhance performance and reliability. While most updates aren’t visible, advanced users can now manually adjust T wave identification for greater control in ECG analysis.

This update includes a critical correction to QTc over-estimation caused by T wave elevation. Unlike traditional approaches that rely on the isoelectric line, the tangent method identifies the true T wave baseline, reflecting your heart’s real repolarization. This improved algorithm now ensures more accurate QTc calculations, enhancing the reliability of ECG analysis. A huge Thank You to everyone who shared their ECG data to help us make these improvements! Your support drives us forward.

In Version 1.9.6, we’re thrilled to roll out the Export Your ECGs feature! Now, you can export your ECG data to a CSV file, which includes detailed measurements for each reading—such as PR, QRS, QT, and RR intervals—along with five QTc calculation options: Bazett, Fridericia, Framingham, Hodges, and Rautaharju. This range of QTc formulas allows you to choose the method that best aligns with your needs or healthcare recommendations. The CSV format is designed to make it easy for you to track trends, perform your own analysis, or share data with healthcare providers, helping you take an active role in monitoring and understanding your heart health.

ECG+ interprets your Apple Watch ECGs to detect more potential arrhythmias and abnormalities. ◆ Atrial Fibrillation Detection: Identifies the most common arrhythmia that often requires medical attention. ◆ PAC/PVC Identification: Recognizes common but typically benign heart conditions. ◆ Prolonged QT Interval Alerts: Highlights prolonged QT intervals, indicating potential delays in heart recharging. ◆ T Wave Changes: Detects inverted or flattened T waves, which may suggest underlying health issues. ◆ HRV Monitoring: Tracks Heart Rate Variability (HRV), a key indicator of overall wellbeing.

The latest version of ECG+ includes a new Heartbeat Navigator, designed to help users quickly locate abnormal heartbeats, such as PACs or PVCs, for more efficient analysis. This powerful tool enhances the user experience, making heart monitoring more intuitive and effective. Additionally, the app now offers advanced detection for T wave abnormalities. Capable of identifying both flattened and inverted T waves, ECG+ provides essential insights into possible heart conditions, supporting early detection and proactive health management. This upgrade allows users to monitor their heart health with increased precision and confidence.

The latest version of ECG+ includes a new Heartbeat Navigator, designed to help users quickly locate abnormal heartbeats, such as PACs or PVCs, for more efficient analysis. This powerful tool enhances the user experience, making heart monitoring more intuitive and effective. Additionally, the app now offers advanced detection for T wave abnormalities. Capable of identifying both flattened and inverted T waves, ECG+ provides essential insights into possible heart conditions, supporting early detection and proactive health management. This upgrade allows users to monitor their heart health with increased precision and confidence.

The latest version of ECG+ introduces advanced detection for T wave abnormalities, fully compatible with Apple Watch ECG. Now capable of identifying both flattened and inverted T waves, the app provides essential insights into possible heart conditions, supporting early detection and proactive health management. This powerful upgrade lets you monitor your heart health with increased precision and confidence.

The latest version of ECG+ brings advanced T wave abnormality detection, seamlessly integrating with Apple Watch ECG. Now equipped to identify both flattened and inverted T waves, the app delivers crucial insights into potential heart conditions, enabling early detection and proactive management. This enhanced functionality empowers you to take charge of your heart health with greater accuracy and confidence.

With seamless integration with Apple Watch ECG, the latest version of ECG+ introduces powerful T wave abnormality detection. Now capable of identifying both flattened and inverted T waves, the app provides critical insights into potential underlying heart conditions. This enhanced feature offers early detection and proactive management, helping you stay ahead of your heart health with precision and ease.