AppleCare+ is when you pay for more than the 1 year repair and 90 days support. Noted at:
AppleCare (without the plus mark) is what we read as "Every Mac, iPhone, Apple Watch, iPad, iPod, Apple TV and display comes with complimentary telephone technical support and a limited warranty from Apple."
There was no need to join the program unless you were sold the Plus version.
In the review of the Apple Iphonex in 20th Dec issue it talks about the Apple Upgrade Programme included free Apple Care.
I have Joined this Program and it does include Apple Care but it is not free and cost is added to monthly payment.