‘Seek medical attention,’ her Apple Watch said. Good thing she did.

A new study from the University of California, San Francisco and a health startup suggests that Apple Watch and Fitbit can accurately diagnose common health issues such as hypertension and sleep apnea. (Apple Inc.)

Deanna Recktenwald remembers feeling slightly out of breath. But she chalked it up to being out of shape. 

“I used to play volleyball at school. I was on the cheerleading squad and I was a gymnast for 13 years, but I hadn't been active in a while,” said the 18-year-old from Lithia. Then her Apple Watch pinged.