HRVSpark

Health & Fitness

Free · In‑App Purchases

Thank you to all you watchers of HRV and RHR. Pro is $0.99 for Summer 2026: one-time purchase, no subscription. HRVSpark puts your raw Heart Rate Variability data directly on your Apple Watch face as a beautiful, glowing sparkline complication. WHAT YOU GET • Free 8-hour raw HRV sparkline complication with your latest SDNN reading • Pro 24-hour, 7-day, and 30-day complication views for broader context • Circular gauge and corner complications built for glanceable watch-face use • Clean iPhone companion app with live gallery, install guidance, and detail views WHY RAW? Most HRV apps bury your data behind opaque "readiness scores" and color-coded stress labels. HRVSpark skips the interpretation layer entirely. You see the actual numbers — and over time, you build your own intuition about what your data means. BUILT FOR YOUR WRIST HRVSpark is complication-first. It was designed from day one to live on your watch face, not behind an app icon. Glance at your wrist and immediately see your trend. PAIR IT WITH RHRSpark Our sister app RHRSpark brings the same no-scores, no-verdicts philosophy to resting heart rate, giving you a complementary baseline view alongside HRVSpark. SIMPLE, HONEST PRICING Free to try with a one-time Pro unlock. No subscriptions. No tracking. No ads. Ever.

Ratings & Reviews

  • 5.0
    out of 5
    2 Ratings

Adds support for showing current Pro unlock promotions in the iPhone app and Apple Watch app when a campaign is active.

Version 1.0.6

The developer, Joel Farthing, 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
    • Joel Farthing
    Size
    • 2.8 MB
    Category
    • Health & Fitness
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Apple Watch
      Requires watchOS 10.6 or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © 2026 Filament Labs
  • Developer Website
  • Privacy Policy

    • More by Joel Farthing

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