Help and Support for
Apple Watch Ultra 3
watchOS 26
Choose a help topic
My Apple Watch Ultra 3 watchOS 26 doesn't register my activity
Cause 1 of 3: Your Apple Watch is too loose on your wrist
If your Apple Watch is too loose on your wrist, some of the watch sensors will not function correctly.
Solution: Adjust the watch strap so that your Apple Watch is neither too loose nor too tight on your wrist.
