SuperSimpleQTCalculator

Phone and Watch

$1.99 · Designed for iPad. Not verified for macOS.

QTc Reference Calculator is a fast, streamlined reference tool for licensed healthcare professionals and medical students to compute corrected QT intervals at the bedside using four established, peer-reviewed formulas. FORMULAS INCLUDED: • Bazett (1920) • Fridericia (1920) • Framingham/Sagie (1992) • Hodges (1983) KEY FEATURES: • Instant QTc Calculation — Enter QT interval and heart rate to get immediate results using the widely referenced Bazett formula • Formula Comparison View — One tap displays three alternative correction formulas (Framingham, Fridericia, and Hodges) with published evidence of better rate-correction accuracy at elevated heart rates • Published Reference Ranges — Results displayed alongside commonly cited thresholds from peer-reviewed literature, with color coding to indicate position relative to these ranges • Apple Watch Support — Full-featured calculator right on your wrist for quick bedside reference • Full Methodology Disclosure — In-app access to every formula, equation, and published citation used in calculations • Clean, Focused Design — No clutter, no ads, no unnecessary features — just the calculation you need WHY MULTIPLE FORMULAS MATTER: Published studies indicate Bazett's formula overcorrects at elevated heart rates. For patients with atrial fibrillation or tachycardia, the Framingham, Fridericia, and Hodges formulas show better rate-correction accuracy. This app makes it easy to compare all four formulas side by side when clinical context calls for it. All formulas are sourced from published, peer-reviewed medical literature. No proprietary algorithms or novel methodologies are used. IMPORTANT: This app is a reference calculator for licensed healthcare professionals only. It does not diagnose, treat, or recommend therapy for any medical condition. All clinical decisions must be made by qualified clinicians exercising independent professional judgment. Consult with a physician before making medical decisions.

Ratings & Reviews

  • 5.0
    out of 5
    1 Ratings

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

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • ClinicianBuilt LLC
    Size
    • 10.3 MB
    Category
    • Medical
    Compatibility
    Requires iOS 18.0 or later.
    • iPhone
      Requires iOS 18.0 or later.
    • iPad
      Requires iPadOS 18.0 or later.
    • Mac
      Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 2.0 or later.
    Languages
    • English
    Age Rating
    16+
    Copyright
    • © 2026 Craig Napolitano
  • Developer Website
  • Privacy Policy

    • Supports

    • Family Sharing

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

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