Zone Pro: HR Power Pace

Triathlon Training Zones

Only for iPhone

$4.99 · Designed for iPhone. Not verified for macOS.

iPhone

Zone Pro is a unified training zone calculator for triathletes and endurance athletes, built around the methods coaches actually use. Heart rate zones: - Karvonen method (percent heart rate reserve) from your max and resting heart rate - LTHR-based 6-zone model from your lactate threshold heart rate Cycling power zones: - Classic Coggan 7-zone model from your FTP (Functional Threshold Power) Running pace zones: - 5-zone model calculated from your threshold pace, in min/km or min/mile Swim CSS zones: - Critical Swim Speed from a 400m or 200m time trial, converted into pace-per-100m training zones Enter your test numbers once and see every zone, for every discipline, laid out clearly with exact ranges, not vague guesses. Switch calculation methods to match what your coach or training plan uses. Zone Pro works entirely offline and keeps your data on your device. No account, no subscription, no ads. This app performs standard, published training-zone calculations for educational and training-planning purposes. It is not a medical device and does not replace advice from a coach or physician.

Ratings & Reviews

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Stability improvements: - Your inputs are now saved immediately when you leave the app (previously a quick app switch right after typing could lose the last change) - Fixed swim CSS zone boundaries so adjacent zones no longer share the same time (Z1/Z2 and Z4/Z5 overlapped by one second)

Version 1.0.1

The developer, Yoshifumi Sato, 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
    Yoshifumi Sato
    Size
    12.1 MB
    Category
    Health & Fitness
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    English
    Age Rating
    4+
    Copyright
    © 2026 Zone Pro
  • Privacy Policy

    • Supports

    • Family Sharing

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

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