The latest hit app with fickle teenagers is called YOLO. First released on the App Store just 1 week ago, it currently takes the number 1 spot on the charts, with an ave 4.7 star rating and 45,000 reviews so far.

YOLO is one of the latest apps built on top of Snapchat’s Snap Kit platform, which enables app developers to allow login using Snapchat IDs, and uses other Snapchat elements such as Bitmoji.

Read more about YOLO on TechCrunch and FastCompany.