My Apple Watch’s ( green light) heart rate monitor doesn’t work while using heart rate app , breathe app and even work out up. I have tried pair and unpair thing to my Apple Watch and still doesn’t work. What should I do??? I need help here 😢. I

Hi

There is no known issue with the heart rate sensor under watchOS 4.1.

The following steps may help:

Check your settings:

• On your iPhone, in the Watch app, go to: My Watch (tab) > Privacy - turn on Heart Rate and Fitness Tracking.
• On your iPhone, in the Watch app, go to: My Watch > Workout > turn off Workout Power Saving Mode, if it is currently enabled.
• On your iPhone, go to: Settings > Privacy > Motion & Fitness - check that both Fitness Tracking and Health are enabled.

Check that you have set up the Activity app:

• Track daily activity

If you are not yet doing so, use these settings:

• On your iPhone, in the Watch app, go to: My Watch (tab) > Passcode.
• Turn on each of Wrist Detection, Passcode and Unlock with iPhone.
• After putting it on your wrist, your Apple Watch will then unlock after whatever you do first: either unlocking your watch manually (by entering the passcode) or unlocking your iPhone.
• When worn sufficiently snugly, it will then remain unlocked (including when the screen is asleep) until you remove it from your wrist.
• When you remove your Apple Watch, it will lock automatically.

Close certain apps and restart both your iPhone and your Apple Watch:

• Close the Watch app, Activity app and Health app (if open) on your iPhone:
  • Double-click the Home button, then swipe up on each app preview to close the apps.
• Turn both devices off together, then restart your iPhone first:
  • Restart your iPhone, iPad, or iPod touch - Apple Support
  • Restart your Apple Watch - Apple Support

If the issue persists, then - given that you have already tried unpairing and re-pairing your Apple Watch - I suggest that you contact Apple Support (remote diagnostics and/or mail-in service may be available, if required), make a Genius Bar reservation or visit an Apple Authorised Service Provider for assistance:

• US: Apple Watch Service Answer Center - Apple Support
• Elsewhere: Select your country for Apple Watch service and repair information

I followed all of the above steps and now my heart rate monitor is working all the time. I had disabled the "lock" feature so that I did not have to put it in every time I took my watch off. Hope you have as much success