Apple launches new app to help users detect irregular heart rhythms

A man cleans the Apple logo 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)