How to Use Facebook on Apple Watch
Open Facebook on Your Apple Watch
Compose an email message to yourself. In the body of the email, place the following on a line by itself
Send the email to the account you've created for your iPhone's Mail app. You can use your Apple Watch to read the email as a result.
Open the Mail application on your Apple Watch. Swipe down on the screen to make the Mail client start downloading new messages when you access the inbox.
Tap the Facebook link when the email displays on your Apple Watch.
Log in to Facebook after it has loaded. Your login information will be remembered by the Apple Watch, so you should only need to log in once.
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