In a new policy brief from the Institute for Family Studies (IFS) and the Ethics and Public Policy Center (EPPC), we present the current harms to children caused and facilitated by smartphones (and tablets) and the app stores they host, driven by Big Tech companies’ financial incentives that misalign with the welfare of kids. The device-and-app-store industry has been virtually unregulated, especially for child safety. The brief offers several possible solutions for lawmakers and industry leaders to implement, which ensure devices and their app stores are safer for children and bring much-needed accountability.