Instagram app icon on smartphone screen illustration.
This image provided under the Creative Commons Attribution 3.0 license. You can copy, distribute, adopt and transmit the work for any purpose, eve
Instagram was central to the case — Kaley began using it at nine and was spending sixteen hours a day on the app by her teenage years. © Yuri Samoilov, CC BY 2.0, via Wikimedia Commons

More on this story