New Delhi: Apple launched a host of products at its well-attended developer's conference in San Francisco, including two operating systems for its PC and its iPhone and iPad, besides a software update for its watch and a couple of apps on news and online payments.

In an event on Monday that was streamed and watched across the globe, it also launched a music service on its proprietary devices to challenge rivals such as Spotify and Pandora. The news app, with a magazine layout, allows users to customise the content with over a million topics to choose from, Apple said.