The Center for Injury Research & Prevention is seeking teens age 16-19 and a parent to participate in a research study about distracted driving. Both teens and parents must be licensed drivers and use smartphones. The purpose of this research study is to figure out if a new smartphone app impacts distracted driving, and to learn parent and teen perspectives on the app. Participants will be asked to complete occasional surveys and use a smartphone app for up to 3 weeks. The entire study can be completed remotely, and no visits to CHOP are required. Families are compensated for their time in the study.