Apple shows off three new iPhones and smartwatch to detect heart problems

Apple has launched a trio of iPhones and upgraded smartwatches that can detect heart problems at its annual product launch event in Cupertino on Wednesday. The tech company unveiled a new iteration of the flagship iPhone X with a 5.8in screen dubbed the iPhone XS – pronounced "ten S" rather than "excess" as well as the iPhone XS Max, which comes with a larger 6.5in screen. Both feature an upgraded version of the iPhone X's dual lens camera – one of the device's best features – which allows for better portraits and higher-quality videos even in low light. They also come with Face ID facial recognition for unlocking the device and a richer display. The company is also launching a lower-cost 6.1inch version, the iPhone XR.