Wearables can show stress proxies. They cannot read your mind.
daygauge turns HRV, resting heart rate and sleep into recovery context, and avoids any stress, burnout or mental-health diagnosis.
Start with what your own data can show.
People want to know why they feel off when a wearable says stress or recovery has changed.
The right answer is context: your sleep, activity, the habits you log and how far each reading is from your own average.
daygauge does not read stress scores from wearables. It uses HRV and resting heart rate from Apple Health as recovery signals, compared with your own average.
What this guide covers.
How the app handles this.
What this can look like in the app.
Example: HRV was below your average on two evenings you logged as heavy work, and your sleep started 41 minutes later than your usual window.
ExampleConfidence rises when the same pattern repeats against your own baseline and drops when key signals are missing.
Try one small change, log it, then see whether the pattern repeats over the next week.
Example 1
Example: resting heart rate stayed above your average after three high-activity days, and readiness read lower than usual.
Example 2
Example: nights after you logged late caffeine sit beside a higher resting heart rate than your average.
Further reading.
These studies describe groups of people. They help explain the topic, but they cannot tell you what will happen to you.
- PLOS ONE 2024 physical activity and HRV meta-analysis
- 2025 sleep deprivation and HRV meta-analysis
- 2024 resting heart rate and physical activity cohort
Research context only. daygauge does not diagnose, treat, prevent or predict disease risk. Personal medical concerns belong with a qualified clinician.
What daygauge does not do.
Related guides.
Want daygauge to explain wearable stress in your own data?
daygauge is free to download. Pro is £8.99 a month or £49.99 a year.
Download on the App StorePersonal analytics, not medical advice