ECG Tracker+ EKG Reader HRV vs QTc Tracker for SSRI & SNRI

Explore your Apple Watch ECGs in detail, follow changes over time, and keep useful records for conversations with your doctor. ECG Tracker+ brings your ECG recordings from Apple Health into one organized library. Review interactive waveforms, explore estimated measurements, add context to your recordings, and revisit your results on iPhone and Apple Watch. TAKE A CLOSER LOOK Zoom into your ECG waveform and explore the shape of a beat with Beat Morphology. See available measurements alongside the recording, with explanations to help you understand the terminology. • Heart rate and beat-to-beat RR intervals • Heart rate variability (HRV), including rMSSD and SDNN • QT and corrected QT (QTc), with a choice of correction formulas • PR interval, P-wave duration, and QRS duration Review highlighted possible premature beats and repeating patterns, including PACs, PVCs, bigeminy, and trigeminy. Measurements and findings depend on the recording and signal quality and may not always be available. SEE YOUR RECORDINGS OVER TIME Explore charts for heart rate, HRV, QTc, and other ECG measurements. Compare periods and return to individual recordings for more detail. Use the Heart Rate Timeline to view Apple Health heart rate readings alongside the times you recorded an ECG. KEEP THE CONTEXT THAT MATTERS Add notes and symptom tags so you can remember how you felt when you recorded an ECG. Find recordings with notes, set aside ECGs for your next visit, and keep questions for your doctor with the relevant recording. SHARE A CLEARER RECORD Export PDF reports with your ECG waveform, measurements, and notes. Bring the details you want to discuss to an appointment or share a report directly from your iPhone. REVISIT RESULTS ON YOUR WATCH Browse recent recordings, view waveforms and available measurements, and check trends from your wrist. The companion app displays results processed on your paired iPhone and synced to Apple Watch. ANALYSIS ON YOUR IPHONE Your ECG recordings are analyzed on your iPhone without uploading them to a cloud analysis service. No account is required. ECG Tracker+ reads from Apple Health without changing your Health records. START FREE Get three free full ECG analyses each month, including PDF export for those unlocked recordings. Recordings unlocked with your free allowance remain unlocked. An optional subscription adds unlimited analysis and full Trends access. Requires ECG recordings in Apple Health. Record new ECGs using Apple's ECG app on a supported Apple Watch. The companion app requires the paired iPhone for analysis and syncing. ECG Tracker+ is an informational measurement tool and is not a medical device. It does not provide medical advice, diagnosis, or treatment. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

QTc Tracker automatically analyzes your smartwatch ECGs from Apple Health and computes the QT and QTc interval – ideal for keeping an eye on your heart when starting, during and after SSRI therapy or other QT-prolonging medication. • Automatic import of your ECGs from Apple Health – optionally with a notification whenever a new ECG arrives • Precise QT measurement using the tangent method on an averaged, low-noise heartbeat • QTc via Fridericia, Bazett, Framingham and Hodges • Clear trend chart with zones (450 / 470 / 500 ms), baseline and trend line – for 1 month, 6 months, 12 months, the therapy or everything • Therapy start and end: baseline before the start, trend during therapy, recovery afterwards • Import medications and logged doses from Apple Health (iOS 26 or later) • Resting heart rate and HRV (SDNN) trends • Doctor's report as PDF: trend, ECG traces with measurement points, measurement table, medications with dose – in A4 or US Letter • Share cards for social media: “QT normal” – honest even when readings stand out • Measurement reminders, CSV export, light and dark mode, 31 languages • 100% offline: no cloud, no account, your data is never shared How it works: Record an ECG with your smartwatch. QTc Tracker reads it from Apple Health, averages the beats into a clean signal, and detects the QRS onset and T-wave end with the tangent method. From these it derives QT and the rate-corrected QTc values that you can follow over time. Important: QTc Tracker is not a medical device and does not replace a physician's ECG interpretation or diagnosis. The automatic measurement may differ from clinical assessment and is intended solely for your personal tracking. If you have symptoms or a QTc of 500 ms or more, seek medical advice, and never stop an SSRI on your own.