Extensive scholarship has investigated technology use among families. Existing work has focused primarily on parents’ reactions to and restrictions of their children’s technology use; here, we explore the underlying tensions surrounding technology use in the home. We draw on historical perspectives of adolescence and family life to better understand technology’s impact on present-day parents and teens. Through an interview study with 18 parent-child pairs (19 parents; 23 children, ages 10-17), we find a number of technology tensions, including 1) parents’ underestimation of children’s technology use; 2) children’s perception that parents only tell them which behaviors to avoid; 3) both parents’ and children’s poor adherence to household technology rules; and 4) parents’ and children’s desire for mutual attention. We argue that the use of personal devices introduces distinctive challenges into modern family life, due to the limited visibility (or practical obscurity...