mobile apps

Dr. Sanjay Gupta tests the Apple Watch's new ECG heart monitor

Since the Apple Watch Series 4 was announced in September, one of its most anticipated functions has been the promise to perform a mobile electrocardiogram (ECG or EKG) whenever a consumer wants. The feature becomes available in the United States on Thursday via a software update.

Facebook internal emails show Zuckerberg targeting competitor Vine

Mark Zuckerberg and his colleagues were apparently concerned enough about Vine, a video app from Twitter, that on the day it launched in January 2013, they moved to restrict its access to Facebook user data, a trove of internal Facebook emails released by the U.K. Parliament on Wednesday shows.

How Tumblr's adult content crackdown could alienate users

Tumblr says it is banning images and videos that feature "adult content," including pornography, from its platform. The change, which will start December 17, threatens to alienate some of the blogging website's most active communities.