Research Question: Among family medicine residents, does enhanced feedback through an app providing alerts and test questions (spaced education), compared to the same app without alerts and enhanced feedback (no spaced education), improve competence as measured by the certification examination? In building this proposal for a definitive trial, the investigators have support from coast to coast. In addition to key clinician educators, the team includes knowledge users from the organization responsible for the certification examination in Family Medicine, methodologists and experienced researchers who study how mobile apps can promote engagement with clinical information. The team has the right blend of expertise in medical education and cluster randomized trials.