HealthKit Setup
If Arry is empty or metrics are not calculated, permissions are the most common cause.
1) Check permissions
- Open iOS Settings → Privacy & Security → Health.
- Find Arry.
- Enable read access for sleep, heart rate, HRV, and activity data available on your device.
2) Make sure the data exists
- Check the Health app for recent sleep, heart rate, and HRV data.
- HRV often appears only when you wear Apple Watch, especially overnight.
Tip: after changing permissions, fully close Arry and open it again.