When the anonymous social media app YOLO was launched in May 2019, it topped the iTunes downloads chart after just one week, despite the lack of a major marketing campaign. Designed to be used with social network Snapchat, YOLO lets users invite people to send them anonymous messages. Its viral popularity followed that of other apps, such as the now infamously defunct Yik Yak as well as Whisper, Secret, Spout, Swiflie and Sarahah. All these cater to a desire for anonymous interaction online.