Pair your Apple Watch with your iPhone:
1. Hold your Apple Watch near your iPhone or use the Watch app → Add Watch.
2. Choose Set Up for Myself and follow the on-screen steps (position the Watch in the viewfinder or pair manually).
3. Keep both devices nearby, connected to Wi-Fi, and on charge until setup finishes.
Give Hiiro access to Apple Health:
1. On your iPhone open Apple Health and go to Sharing → Apps → Hiiro.
2. Turn ON all Read and Write permissions.
Connect Hiiro to Apple Health and Apple Watch:
In Hiiro iOS app go to Profile & Settings → Connected apps → Apple Health. Check if the status on both Apple Health and Apple Watch says "Connected".