WhatsApp rolled out Snapchat-style disappearing photos and videos to iOS beta testers on Friday. Called "View Once", it lets users send photos and videos that vanish from chats after a single view. Android beta testers got it last month. View Once will not block people from taking screenshots of disappearing photos and videos, and senders will not be notified if screenshots are taken. WhatsApp already lets users send messages that automatically delete themselves after 7 days. Link
