Apple unveils its priciest iPhone, new smartwatch

Apple on Wednesday unveiled updated versions of its priciest iPhones along with a new smartwatch that allows users to take their own electrocardiograms, as the US tech giant looks to boost its momentum in a sputtering market.

The California tech giant revealed its iPhone XS and iPhone XS Max, updating the top-of-the line handsets released a year earlier.The new devices are aimed at maintaining Apple's share in the premium segment."We are going to take iPhone X to the next level," chief executive Tim Cook said at a media event at the company's headquarters in Cupertino, California.The new phones have displays of 5.8 and 6.5 inches, boosting screen size while keeping a small-format handset, Apple vice president Phil Schiller said.While the iPhone has made Apple the world's most valuable company, worth more than $1tn, it has slipped to third place among smartphone makers as Chinese-based Huawei has grabbed the number two spot.Apple also introduced a fourth generation of Apple Watch with a major redesign - and a series of features designed to improve its performance as a medical and health device.The watch, sold in the United States from $399 and up, will be available in stores on September 21.