Apple is touting a 50 ms accuracy on their new Apple Watch. That sounds suspiciously like the accuracy of NTP. If Apple is relying on NTP for the watch, they would be crazy to not help out financially for its support.
No watch gets it's time using NTP, and I don't even know how that would work. Almost all radio timepieces take their time from WWVB (or international equivalents). There may be a few that use GPS like cell phones do.
EDIT: The apple watch uses GPS.
No GPS hardware in the Apple Watch so it would be more accurate to say it uses GPS in the iPhone. Any reference for this? It does make sense though.
Hmmm, you're right, the Apple site says it uses GPS and WiFi in the iphone, whatever that means. So I guess it's possible the watch syncs with the phone using NTP. Good catch.
50 ms? NTP is far more accurate then that.
If it is 10 ms, Apple isn't going to promise that. It is on the right order of magnitude I think.