Hi
When Push Alerts are enabled, Apple Watch will alert you about timers and alarms that you have set on your iPhone:
- On your iPhone, in the Watch app, go to: My Watch > Clock > check that Push Alerts from iPhone is enabled / on.
- For the best performance, keep both Bluetooth and Wi-Fi permanently enabled on your iPhone.
However, how notification alerts behave depends on the status of your devices:
- When you have Wrist Detection enabled (on your iPhone, in the Watch app, go to: My Watch > General > Wrist Detection):
- If your iPhone is unlocked, you'll receive notifications on your iPhone instead of on your watch.
- If your iPhone is locked or asleep and your watch is unlocked and on your wrist, you'll receive notifications on your watch.
Also check your Sounds & Haptics settings:
- On your iPhone, in the Watch app, go to: My Watch > Sounds & Haptics - check that:
- The Alert Volume selector is where you want it to be;
- Silent Mode is not enabled;
- The Haptic Strength selector is in the central or right hand position.
- Prominent Haptic is enabled (to get pre-announcements of common alerts).
You can also set alarms directly on your watch using the Alarm Clock app:
- From your watch face, access the Home screen by pressing the Digital Crown once, then tap on the Alarm Clock app).
More information: https://help.apple.com/watch/#/apd27ce65478
More information:
About notifications on your Apple Watch - Apple Support