Hey!
I’m the developer of Watch Wrist Temp, an app that tracks wrist temperature and now also sleep heart rate. I recently rolled out an update that adds a new feature: sleep heart rate tracking with bar graphs showing min, max, and average values throughout the night.

Why this feature?

After some reflection, I wanted to leverage the Apple Watch Ultra’s sensor capabilities more effectively. Since sleep data can be quite fragmented, I aimed to bring both temperature and heart rate into a single, clear view.

Development challenges:
	•	Data Accuracy: Apple Watch Ultra offers precise data, but combining temperature and heart rate in a meaningful way took some experimentation.
	•	Visualization: Finding the right way to present the data clearly, especially with fluctuating heart rates during sleep, was a big challenge. I ultimately went for bar graphs, as they make variations easier to spot.
	•	User Experience: Balancing detail and simplicity was key. I wanted users to quickly grasp the data without feeling overwhelmed.

Your thoughts?

I’d love to hear your feedback – not just on the feature itself, but on the development approach. How would you improve the presentation of sleep data? Any suggestions for making it even more user-friendly?

Thanks for your input and support!

Tibor Banko

How I enhanced Watch Wrist Temp with sleep heart rate tracking – insights and challenges