YouTube has introduced a new running button in its Android app to randomly select videos for users to watch, using YouTube's short video player.
WhatsApp has introduced new video calling features for the holiday season, including improved participant selection.
The iPhone has introduced a new "Battery Intelligence" feature that provides an estimated charging time. This feature is still in development, and may be delayed for official release.
Apple Music has introduced a new feature called "Set List," allowing artists to create playlists tied to their musical set lists.
