RHRSpark
Joel Farthing Health & Fitness iPhoneiPadiPod touchApple Watch
RHRSpark is a free Health & Fitness app for iPhone and iPad by Joel Farthing. Rated 5.0/5 from 1 ratings. Requires iOS 17.0. Updated October 8, 2026.
- Rating
- 5.0
- 1 ratings
- Price
- Free
- on the App Store
- Size
- 6 MB
- Age 4+
- Updated
- Oct 8
- 2026 · v1.0.7
Screenshots
About RHRSpark
RHRSpark puts your resting heart rate on your Apple Watch face as a sparkline, a gauge, or a corner complication. WHAT YOU GET • Three free 24-hour complications: a sparkline, a gauge, and a corner • Seven Pro complications across 8-hour, 7-day, and 30-day windows • Recent sedentary heart rate and Apple's daily resting heart rate, each labeled • Calculation notes for every complication in the iPhone gallery TWO SOURCES, SHOWN CLEARLY The 8-hour and 24-hour views use heart-rate samples that HealthKit labels as sedentary. The 7-day and 30-day views use Apple's daily resting heart rate. When there is no recent sedentary sample, the big number shows Apple's latest resting heart rate and says so. Longer gaps stay visible instead of being filled in. BUILT FOR THE WATCH FACE Choose rectangular, circular, or corner complications. A short HR or RHR label tells you which source you are seeing and leaves the sparkline the room. The Apple Watch app works without the iPhone app and keeps a record of your daily values. The iPhone app adds older days whenever you open it. ONE-TIME PRO UNLOCK Download free and use the three 24-hour complications. Unlock all ten with a single one-time purchase. No subscription, account, ads, or telemetry. PAIR IT WITH HRVSPARK HRVSpark gives the same direct view of raw SDNN heart rate variability across useful time windows. HealthKit data stays on your devices and moves only between your iPhone and Apple Watch through Apple frameworks. RHRSpark may request a small configuration file from filamentlabs.io to show current product messages. That request contains no health data. RHRSpark is for informational purposes only. It does not provide medical advice or diagnose, treat, cure, or prevent any medical condition.
What’s new
Version 1.0.7 · Updated October 8, 2026
A fresh look for RHRSpark, with a new icon and a gallery that matches HRVSpark. Gauges show a single window label above the number, and rectangular complications use a short HR or RHR label so the sparkline gets the room. The Apple Watch app can now be installed and used without the iPhone app. It also keeps a record of your daily resting heart rate, so the 30-day views fill in even if you rarely open the iPhone app. The iPhone app refreshes when you open it, and its history reaches your watch even while the watch app is closed. Restore Purchases moved next to the Pro unlock in the Gallery.
App privacy
The developer, Joel Farthing, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| RHRSpark | 5.0 / 5 (1 rating) | Free | October 8, 2026 | |
| Stride: Walk to Scroll | – | Free | Mar 27, 2026 | Compare |
| RunnerGoal | 4.6 / 5 (8) | 2.99 USD | Jan 24, 2026 | Compare |
| VO2 Max & Cardio Fitness | – | Free | Oct 10, 2026 | Compare |
| Morning Readiness: Recovery | – | Free | Oct 13, 2026 | Compare |
| Vantage: Longevity Coach | – | Free | Oct 8, 2026 | Compare |
| Daymons | – | Free | Oct 15, 2026 | Compare |
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