![U.S.-NEW YORK-APPLE-HEART DISEASE](http://www.xinhuanet.com//english/2017-12/01/136791597_15121148899921n.jpg)
A man checks his phone at the Apple store inside the Grand Central Terminal in New York, the United States, Nov. 30, 2017. U.S. hi-tech giant Apple Inc. Thursday launched the "innovative" Apple Heart Study app, the first of its kind software program on a mobile device that uses Apple Watch's heart rate sensor to collect data on irregular heart rhythms and notify users who may be experiencing abnormal heart rhythms. (Xinhua/Li Muzi)