Sedentary heart rate
Recent sedentary samples make the last several hours visible without folding movement into the resting signal.
Apple Watch + resting heart rate
rhr/spark
Your Resting Heart Rate. Raw. Beautiful. On your wrist.
RHRSpark puts your Resting Heart Rate on your Apple Watch face. Short windows use sedentary HealthKit samples. Longer windows show Apple's daily RHR directly.
Built for transparent resting heart-rate trends
10
Complications
Multiple watch-face formats.
4
Windows
Short and longer-range views.
2
Sources
Sedentary HR plus Apple daily RHR.
0
Hidden Algorithms
No interpretation.
The instrument
Calm enough to live beside the clock.
RHRSpark is built for repeated glances. The line shows the shape. The large value keeps the
current signal legible. Dashes show where qualifying data is not available instead of
pretending the gap is real signal.
Sedentary
Short windows focus on samples marked sedentary, so movement does
not quietly masquerade as rest.
Apple RHR
Longer windows use Apple's daily resting heart-rate metric
directly, clearly labeled as Apple's source.
Gaps
When there is no qualifying data, the line shows a dash instead
of filling the space with a guess.
Two sources, four windows
Short-term texture and long-term baseline stay separate.
Daily sedentary shape
The 24-hour view helps you notice how rest, work, illness, sleep, or stress show up across the day.
Apple's daily RHR
A week of Apple's own resting heart-rate values gives the short-term line a steadier baseline.
Longer RHR arc
The 30-day view shows drift and baseline movement without inventing a new hidden metric.
Design philosophy
Transparency is the feature.
"I wanted to see the actual shape of my resting heart rate throughout the day. When the line dips, I know why. When
there is a gap, I know I was moving."
- developer
Who it is for
People who want the numbers without a verdict.
The self-tracker
You already notice how illness, sleep, recovery, and stress move resting heart rate. You want that signal closer to the surface.
The transparency advocate
You want to know what counted, what did not, and whether you are seeing sedentary samples or Apple's daily RHR.
The HRV companion user
Resting heart rate complements HRV naturally, broadening the picture without one metric trying to explain the other.
The data-over-decoration type
You do not need encouragement, warnings, or congratulation. You need the trend where you can see it.
Simple pricing
Start free. Unlock Pro once.
Free to download and try with three 24-hour complications. $2.99 one-time unlock for Pro: all 10 complications across four time windows. No subscriptions, no accounts.
