SSRI QT Tracker

QT/QTc from your Health ECGs

$0.99 · Designed for iPad. Not verified for macOS.

Keep an eye on your QT/QTc interval when starting an SSRI – automatically from your Health ECG data, entirely on your iPhone. QT Tracker automatically analyzes your Health ECG data and computes the QT and QTc interval – ideal for keeping an eye on your heart's repolarization when starting an SSRI or other QT-prolonging medication. • Automatic import of your ECGs from Apple Health – entirely on-device • Precise QT measurement using the tangent method on an averaged, low-noise heartbeat • QTc via Fridericia, Bazett, Framingham and Hodges • Trend chart with normal-range thresholds and baseline comparison • Resting heart rate and HRV (SDNN) trends from Apple Health • Store your medications and therapy start date • Measurement reminders for regular ECGs • Export a doctor's report as PDF – with curves, table and measurement points • 100% offline: no cloud, no accounts, your data is never shared How it works: Record an ECG with your smartwatch. QT 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: QT 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.

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The developer, Peter Holzhauser, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

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    Information

    Seller
    • Peter Holzhauser
    Size
    • 31.1 MB
    Category
    • Medical
    Compatibility
    Requires iOS 15.1 or later.
    • iPhone
      Requires iOS 15.1 or later.
    • iPad
      Requires iPadOS 15.1 or later.
    • iPod touch
      Requires iOS 15.1 or later.
    • Mac
      Requires macOS 12.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English and 29 more
    • English, Arabic, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hebrew, Hungarian, Indonesian, Italian, Japanese, Korean, Norwegian Bokmål, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
    Age Rating
    13+
    • 13+
    • Learn More
    • Infrequent
      Medical Treatment information

      Contains
      Health or Wellness Topics
    Copyright
    • © 2026 Peter Holzhauser
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

      Up to six family members can use this app with Family Sharing enabled.