Twitter has launched its live-streaming video app Periscope for iOS. The social networking app makes it possible to broadcast live video quickly and simply, right from an iPhone, iPad or iPod touch. Followers are notified that your broadcast is live, and they can join and comment on the stream in real time. Periscope even has a "hearts" feature that allows viewers to tap the screen to send fluttering hearts as a sign of appreciation.
Periscope will keep track of hearts received, ranking Periscope users in a "Most Loved" list. Earlier this month, Twitter shut down the competing service Meerkat, which was using Twitter accounts to function. Unlike Meerkat, Periscope allows for video replays to be watched for up to 24 hours after the live broadcast.