HRVSpark
Health & Fitness
Free · In‑App Purchases
HRVSpark puts your raw Heart Rate Variability data directly on your Apple Watch face as a beautiful, glowing sparkline complication.
WHAT YOU GET
• Live sparkline graph showing your HRV trend over the past 7 days
• Circular gauge complications with daily, weekly, and monthly averages
• Current SDNN reading displayed right on your watch face
• Clean iPhone companion app with full history 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.
SIMPLE, HONEST PRICING
Free to try with a one-time $2.99 Pro unlock. No subscriptions. No tracking. No ads. Ever.
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
Polished up our App Store home. Same great app, better first impression.
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.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Joel Farthing
- Size
- 2.3 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+
- 4+
- In-App Purchases
Yes
- HRVSpark Pro $2.99
- HRVSpark Tip Jar $4.99
- Copyright
- © 2026 Filament Labs