RHRSpark is an Apple Watch app that displays your resting heart rate directly on the watch face using clear, source-labeled sparkline complications. It separates two distinct data sources: sedentary heart rate from HealthKit samples (for short windows like 8H and 24H) and Apple's daily resting heart rate (for 7D and 30D windows). The app never blends or interprets the data—gaps are shown as dashes, and each complication clearly indicates which source is being used. Key features include:
- 10 complications across multiple watch face formats
- 4 time windows: 8 hours, 24 hours, 7 days, and 30 days
- Two clearly labeled sources: Sedentary HR and Apple daily RHR
- No hidden algorithms: Raw data, no scores or subscriptions
- Free to try with three 24-hour complications; Pro one-time unlock ($2.99) for all complications
Ideal for self-trackers, transparency advocates, HRV companion users, and anyone who wants to see their resting heart rate trends without opaque interpretation.
