In an age in which so much of our communication occurs digitally, WhatsApp, one of the most widely used apps on the planet, is trying to do its part to save you from making a total ass of yourself. They're turning on a key "unsend" feature. That's right: You can now delete messages you've sent to a group or an individual. "This is particularly useful if you sent a message to the wrong chat or if the message you sent contains a mistake," explains WhatsApp.