For Facebook and Google, Android could be a battleground.

Samsung is taking on Apple in the smartwatch battle on its own turf - or operating system at least. The South Korean electronics giant announced on Wednesday that its Gear S2 smartwatch will now be compatible with Apple's iOS devices.

Facebook Inc. and others are racing to turn messaging apps into centers for other online activity, mimicking China?s WeChat. That poses a challenge for developers, who want people to download and use their apps.

When the monthlong marathon of men?s fashion shows kicks off this week, so will the scrimmage to cover it: the race by newspapers, magazines, television networks, social media platforms and blogs to get a piece of the action for themselves and their viewers.