Apple's first watch can not only tell you the right time, the smart watch also has a set of technology that can collect a lot of health data（数据）. When you have been sitting for too long, it will "hit" you on the wrist（手腕）10 minutes before the top of the hour.
"A lot of doctors believe that sitting is the new illness." Apple's CEO Tim Cook said.
Many workers used the Apple Watch first. Then, Apple started selling the Apple Watch in April 2015. "We have a lot of meetings and a lot of workers," Cook said, "and ten minutes before the hour, the watch will hit you and everybody will start standing up."
"It took some time to get used to, but it's actually really excellent." he said.
Users have the chance to share their health data with doctors. And people believe it makes them healthier.
