RHRSpark
Resting HR on Your Watch Face
About
Visualize your resting heart rate directly on your Apple Watch face with customizable complications. Choose from various styles and time windows to see your heart rate trends at a glance. Understand how your data is calculated with full transparency.
What's New in RHRSpark
1.0.4
May 13, 2026
Adds support for showing current Pro unlock promotions in the iPhone app and Apple Watch app when a campaign is active.
In-App Purchases
$0.99
RHRSpark Pro
Unlock 7 Pro complications: 8-hour, 7-day, and 30-day
Developer apps
FAQ
What is RHRSpark?
RHRSpark provides Apple Watch face complications to display your resting heart rate. It offers various styles and time windows to visualize your heart rate trends directly on your watch face.
How does RHRSpark calculate resting heart rate?
Short-term complications use sedentary heart rate samples from HealthKit in 5-minute intervals. Long-term complications display Apple's daily resting heart rate directly, ensuring data integrity.
What are the different time windows available in RHRSpark?
RHRSpark offers four time windows: 8-hour, 24-hour, 7-day, and 30-day. This allows users to view both short-term fluctuations and long-term trends in their resting heart rate.
Is RHRSpark free to use?
RHRSpark is free to download and includes three 24-hour complications. A one-time purchase of $2.99 unlocks the Pro version, offering all 10 complications across all time windows.
Does RHRSpark have ads?
No, RHRSpark does not contain advertisements. The app is free to download with optional in-app purchases for advanced features.
What devices is RHRSpark compatible with?
RHRSpark is compatible with Apple Watch, iPhone, and iPad. It is designed to leverage the capabilities of these Apple devices for heart rate monitoring.
How often is RHRSpark updated?
The latest version of RHRSpark is 1.0.4, last updated on May 13, 2026. Updates typically focus on improving functionality and adding new features based on user feedback.
What is the age rating for RHRSpark?
RHRSpark has an age rating of 4+. This indicates it is suitable for users of all ages and does not contain content inappropriate for children.