Costolo will reportedly relinquish his seat on the board of directors once a new full-time CEO is found, or by year's end.
We show you how to send messages, throbbing heartbeats, dancing emoji, or just have a phone call on Apple's new smartwatch.
The Apple Watch offers a lot of ways to communicate. Here's what it can do and how to do it.
The microblogging service's chief is taking personal responsibility for the platform's slow response to user abuse and harassment, according to memos obtained by The Verge.
The social network now allows users to chat privately without feeling constrained by a space limit. Blabbermouths, however, will get cut off at 10,000 characters.
Commentary: The Samsung Gear S2 watch will be round. But it will need a lot more than that to stand out in the smartwatch jungle.
The social network and the NFL sign a new two-year deal to provide "significantly more" game highlights. That could help the struggling service attract new users.
We spoke with Amazon's Helen Cowley about the pilot shows vying for your votes, finding fresh talent and signing the "Top Gear" boys.
An unlocked Android phone from a brand-new company: we take a first look at it in our hands.
The microblogger's executives say they have no idea when they could see "significant" additions to its monthly active users metric.